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Flex2 40mm Smartwatch with Heart Rate Monitor (Silver)
Smartwatches

Flex2 40mm Smartwatch with Heart Rate Monitor (Silver)

The HiFuture Flex2 smartwatch combines a 1.39-inch IPS touchscreen with a speaker and microphone for Bluetooth calls. It tracks heart rate, blood oxygen, sleep, steps and calories, and supports...

The HiFuture Flex2 smartwatch combines a 1.39-inch IPS touchscreen with a speaker and microphone for Bluetooth calls. It tracks heart rate, blood oxygen, sleep, steps and calories, and supports menstrual cycle tracking and app notifications. The 300 mAh battery provides up to 10 days of battery life.

  • Screen size: 1.39 inches
  • Screen type: IPS
  • Touchscreen:...
See full description See full description

Top specs

  • Battery Life

    Battery life shows how many days the smartwatch can operate without charging.


    It depends on the battery capacity, but also on how much you use it (e.g. active display, GPS, notifications, etc.).


    For example, a smartwatch with 2-3 days of battery life is ideal for daily use with all features enabled.


    Models with 5–10 days or more are suitable for those who do not want to charge often or use it more "lightly".


    The value is especially meaningful when comparing products from the same manufacturer.

  • Display Type

    IPS

    IPS technology is a type of screen that offers wide viewing angles and vibrant colors, ideal for a clear image from any angle. It is suitable for users who want quality display in everyday conditions. They consume more energy compared to OLED, AMOLED & super AMOLED types.

  • Waterproof

    Hand Washing

    You don't need to remove your watch every time you wash your hands. The smartwatch is water-resistant, fully covering frequent washing, making it practical for every moment of the day.
  • See all

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Product report

Description

Description

The HiFuture Flex2 smartwatch combines a 1.39-inch IPS touchscreen with a speaker and microphone for Bluetooth calls. It tracks heart rate, blood oxygen, sleep, steps and calories, and supports menstrual cycle tracking and app notifications. The 300 mAh battery provides up to 10 days of battery life.

  • Screen size: 1.39 inches
  • Screen type: IPS
  • Touchscreen: Yes
  • Connectivity: Bluetooth
  • Compatibility: Android
  • Battery life: Up to 10 days
  • Standby time: 10 days
  • Battery capacity: 300 mAh
  • Sensors: Pedometer, calorie counter, heart rate monitor and blood oxygen monitor
  • Tracking features: Sleep and menstrual cycle
  • Notifications: App notifications
  • Bluetooth calls: Speaker and microphone
  • Remote control: Bluetooth music and camera control
  • Sports modes: Over 100 sports
  • Other features: Alarm, find phone, reminders, brightness adjustment, mute, reset and power off
  • Case material: Plastic
  • Strap material: Stainless steel
  • Diameter: 40 mm
  • Colour: Silver
  • Water resistance: Suitable for hand washing
  • Release year: 2024

Manufacturer

Manufacturer Details

Warnings & Safety Information
See full description

Specifications

Specifications

Technical Specifications

Colour
Silver
Release Date
2024
Screen Size
1.39 "

Screen Size

"The design and size of the casing affect how each screen size appears on the wrist. Most smartwatches have screens of 1.4-1.5 inches."
Screen Resolution
-
Screen Type
IPS

Screen Type

IPS

IPS technology is a type of screen that offers wide viewing angles and vibrant colors, ideal for a clear image from any angle. It is suitable for users who want quality display in everyday conditions. They consume more energy compared to OLED, AMOLED & super AMOLED types.
Compatible Operating System
Android

Compatible Operating System

The smartphone must be compatible with the watch. Apple Watches only connect with iPhones, while some others can connect with both Android and iPhones, but some functions may not be fully supported.
Touch Screen
Yes
Connection
Bluetooth

Connection

Bluetooth
The basic way to connect your smartwatch to your mobile phone and other supported devices, such as wireless headphones.
Strap
-
Case material
Plastic

Case material

Plastic

A very popular and economical material for building casings with low weight but less resistance to impacts and scratches compared to others (e.g. aluminum, stainless steel).

Features & Functions

Features
Speaker, Microphone

Features

Speaker

Playback of multimedia, notification sounds, or voice.

Microphone
For voice commands or speech.
Features & Functions
Application / Calls Notification

Features & Functions

Application / Calls Notification

The smartwatch has the ability to transfer notifications from our mobile phone applications such as receiving SMS, Email or a notification from a social media application. Depending on the smartwatch, we may also be able to read it directly from it.
Use
Misc Sports / Gym, Hiking, Cycling, Running

Use

The smartwatch has the ability to record the corresponding activity and produce relevant statistics.

Additional Specifications

Sensors
Pedometer, Calorimeter, Heart Rate, Oximeter

Sensors

Pedometer

Recording steps and distance.

Calorimeter

Calculates how many calories you have consumed each day.

Heart Rate

Embedded heart rate monitor.

Oximeter

Measure the amount of oxygen in the blood.
Protection
-
ATM Rating
-

ATM Rating

The ATM rating on smartwatches indicates their level of water resistance, which tells how well the watch can withstand exposure to water and various pressure levels.

3 ATM (30 meters): Suitable for everyday splashes, rain, and hand washing.

5 ATM (50 meters): Light swimming, showering.

10 ATM (100 meters): Swimming, snorkeling, water sports.

15 ATM (150 meters): Advanced swimming, water sports.

20 ATM (200 meters): Diving, deep water activities.

50 ATM (500 meters): Professional diving, excellent water resistance.
Waterproof
Hand Washing

Waterproof

Hand Washing

You don't need to remove your watch every time you wash your hands. The smartwatch is water-resistant, fully covering frequent washing, making it practical for every moment of the day.
MIL-STD-810
No

Battery

Battery Capacity
300 mAh

Battery Capacity

Most smartwatches have a battery capacity of around 200mAh. 2. The size of the battery is not always indicative of the autonomy, as this largely depends on the features of the smartwatch and the functions we have active. 3. For example, a smartwatch with a large color touch screen and 24-hour heart rate monitoring will often require charging even if it has a larger battery than a simpler smartwatch.
Battery Life
10 days

Battery Life

Battery life shows how many days the smartwatch can operate without charging.


It depends on the battery capacity, but also on how much you use it (e.g. active display, GPS, notifications, etc.).


For example, a smartwatch with 2-3 days of battery life is ideal for daily use with all features enabled.


Models with 5–10 days or more are suitable for those who do not want to charge often or use it more "lightly".


The value is especially meaningful when comparing products from the same manufacturer.
Standby Time
10 days

Standby Time

The amount of time a smartwatch can operate in standby mode, simply connected to a mobile phone with one charge. A typical average is 12 days, but it depends on what each manufacturer defines as standby mode. Size makes sense mainly in comparing products from the same manufacturer.

Dimensions

Case Size
40 mm

Case Size

40
This size is usually intended for fruits with a circumference of 14-16.5cm.

AI Features

AI Voice Assistant
No
AI Training Coach
-
AI Health Insights
-

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

See all specifications

Reviews (6)

Reviews

4.5
6
4.5
Review this product
  1. 3
  2. 3
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1 star
    0
Review this product
  • Easy synchronization
  • Sufficient number of features
  • Accuracy in measurements
  • Construction quality
  • Durability
  • Battery life
  • Value for money
  • Comfort
  • Screen

Reviews photos

Reviews photos
Reviews photos
Reviews photos
Reviews photos
Reviews photos
Reviews photos

Reviews by our members

  • lascu_bogdan
    4
    lascu_bogdan
    This review is about the colour: Black
    Did you find this review helpful?
  • Angel_pap5263
    4
    Angel_pap5263

    Verified purchase

    This review is about the colour: Black

    For its price, it is excellent (I got it for around €40).
    Personally, I use it as a daily watch for the gym, etc., and it is very convenient for the stopwatch, music control, and notifications.
    Also, I like the design quite a lot as I wanted it to look as much like a regular watch as possible.
    Finally, another positive point, which I didn't expect, is that it has a very good speaker and microphone for calls.

    However, it has the following issues that personally annoy me:
    1) Firstly, for Instagram notifications, it doesn't show you who sent the message (though I don't know if this is a problem with the app itself or the watch).
    2) When you start recording an exercise, it doesn't let you use the watch for anything else except music control. It would be useful if you could also use the stopwatch, notifications, etc.
    3) You can't set it to silent (vibration) for incoming calls. Also, it's very annoying that sometimes, even after you've answered the phone, it keeps ringing until you stop it from the watch.

    Translated from Greek ·
    Did you find this review helpful?
  • thers1980
    5
    1 out of 1 members found this review helpful
    thers1980
    This review is about the colour: Black

    It does everything it promises. Strong battery, calls from the watch to 100 contacts. Heart rate, oxygen measurement, sleep, menstrual cycle, faces for all tastes. Notifications for many applications besides TikTok and Outlook. Overall very satisfied for a watch under 40 euros. 39.90.

    Translated from Greek ·
    Did you find this review helpful?
  • mari_john
    4
    3 out of 4 members found this review helpful
    mari_john

    Verified purchase

    Positives:
    1) It will definitely satisfy you with the updates you will receive. That is, the vibration for calls or messages will ensure that you do not miss notifications.
    2) Its speaker is extremely loud and you will hear it crystal clear, as well as its microphone.
    3) The battery seems to be quite good.
    4) It supports Greek letters, has a Greek menu.
    5) It has a pulse oximeter.
    6) The app is quite good to the point of being comparable to other more expensive ones.

    Negatives:
    1) It is difficult to read any notifications in Greek due to the difficulty in displaying them with the correct spacing. Of course, for €60 you can overlook this.
    2) Few options for backgrounds.
    3) Basic apps are missing as options to receive notifications (e.g., Outlook, TikTok).

    Conclusion:

    It is worth buying it on the condition that you spend a little money and purchase a product that so far seems more expensive.

    Translated from Greek ·
    • Easy synchronization
    • Sufficient number of features
    • Construction quality
    • Battery life
    • Value for money
    • Comfort
    • Screen
    Did you find this review helpful?
  • 5
    Antonis_Braoudakis6904

    Verified purchase

  • 5
    dimitrastathaki

    Verified purchase

    This review is about the colour: Black

    • Easy synchronization
    • Sufficient number of features
    • Accuracy in measurements
    • Construction quality
    • Screen
    • Durability
    • Battery life
    • Value for money
    • Comfort
  • lascu_bogdan
    4
    lascu_bogdan
    0
  • Angel_pap5263
    4
    Angel_pap5263

    For its price, it is excellent (I got it for around €40).
    Personally, I use it as a daily watch for the gym, etc., and it is very convenient for the stopwatch, music control, and notifications.
    Also, I like the design quite a lot as I wanted it to look as much like a regular watch as possible.
    Finally, another positive point, which I didn't expect, is that it has a very good speaker and microphone for calls.

    However, it has the following issues that personally annoy me:
    1) Firstly, for Instagram notifications, it doesn't show you who sent the message (though I don't know if this is a problem with the app itself or the watch).
    2) When you start recording an exercise, it doesn't let you use the watch for anything else except music control. It would be useful if you could also use the stopwatch, notifications, etc.
    3) You can't set it to silent (vibration) for incoming calls. Also, it's very annoying that sometimes, even after you've answered the phone, it keeps ringing until you stop it from the watch.

    Translated from Greek ·
    0
  • thers1980
    5
    thers1980

    It does everything it promises. Strong battery, calls from the watch to 100 contacts. Heart rate, oxygen measurement, sleep, menstrual cycle, faces for all tastes. Notifications for many applications besides TikTok and Outlook. Overall very satisfied for a watch under 40 euros. 39.90.

    Translated from Greek ·
    1
  • mari_john
    4
    mari_john

    Positives:
    1) It will definitely satisfy you with the updates you will receive. That is, the vibration for calls or messages will ensure that you do not miss notifications.
    2) Its speaker is extremely loud and you will hear it crystal clear, as well as its microphone.
    3) The battery seems to be quite good.
    4) It supports Greek letters, has a Greek menu.
    5) It has a pulse oximeter.
    6) The app is quite good to the point of being comparable to other more expensive ones.

    Negatives:
    1) It is difficult to read any notifications in Greek due to the difficulty in displaying them with the correct spacing. Of course, for €60 you can overlook this.
    2) Few options for backgrounds.
    3) Basic apps are missing as options to receive notifications (e.g., Outlook, TikTok).

    Conclusion:

    It is worth buying it on the condition that you spend a little money and purchase a product that so far seems more expensive.

    Translated from Greek ·
    3
  • 5
    Antonis_Braoudakis6904

    0
  • See all

Description & Specifications

The HiFuture Flex2 smartwatch combines a 1.39-inch IPS touchscreen with a speaker and microphone for Bluetooth calls. It tracks heart rate, blood oxygen, sleep, steps and calories, and supports menstrual cycle tracking and app notifications. The 300 mAh battery provides up to 10 days of battery life.

  • Screen size: 1.39 inches
  • Screen type: IPS
  • Touchscreen: Yes
  • Connectivity: Bluetooth
  • Compatibility: Android
  • Battery life: Up to 10 days
  • Standby time: 10 days
  • Battery capacity: 300 mAh
  • Sensors: Pedometer, calorie counter, heart rate monitor and blood oxygen monitor
  • Tracking features: Sleep and menstrual cycle
  • Notifications: App notifications
  • Bluetooth calls: Speaker and microphone
  • Remote control: Bluetooth music and camera control
  • Sports modes: Over 100 sports
  • Other features: Alarm, find phone, reminders, brightness adjustment, mute, reset and power off
  • Case material: Plastic
  • Strap material: Stainless steel
  • Diameter: 40 mm
  • Colour: Silver
  • Water resistance: Suitable for hand washing
  • Release year: 2024

Manufacturer

Manufacturer Details

Warnings & Safety Information

Technical Specifications

Colour
Silver
Release Date
2024
Screen Size
1.39 "

Screen Size

"The design and size of the casing affect how each screen size appears on the wrist. Most smartwatches have screens of 1.4-1.5 inches."
Screen Resolution
-
Screen Type
IPS

Screen Type

IPS

IPS technology is a type of screen that offers wide viewing angles and vibrant colors, ideal for a clear image from any angle. It is suitable for users who want quality display in everyday conditions. They consume more energy compared to OLED, AMOLED & super AMOLED types.
Compatible Operating System
Android

Compatible Operating System

The smartphone must be compatible with the watch. Apple Watches only connect with iPhones, while some others can connect with both Android and iPhones, but some functions may not be fully supported.
Touch Screen
Yes
Connection
Bluetooth

Connection

Bluetooth
The basic way to connect your smartwatch to your mobile phone and other supported devices, such as wireless headphones.
Strap
-
Case material
Plastic

Case material

Plastic

A very popular and economical material for building casings with low weight but less resistance to impacts and scratches compared to others (e.g. aluminum, stainless steel).

Features & Functions

Features
Speaker, Microphone

Features

Speaker

Playback of multimedia, notification sounds, or voice.

Microphone
For voice commands or speech.
Features & Functions
Application / Calls Notification

Features & Functions

Application / Calls Notification

The smartwatch has the ability to transfer notifications from our mobile phone applications such as receiving SMS, Email or a notification from a social media application. Depending on the smartwatch, we may also be able to read it directly from it.
Use
Misc Sports / Gym, Hiking, Cycling, Running

Use

The smartwatch has the ability to record the corresponding activity and produce relevant statistics.

Additional Specifications

Sensors
Pedometer, Calorimeter, Heart Rate, Oximeter

Sensors

Pedometer

Recording steps and distance.

Calorimeter

Calculates how many calories you have consumed each day.

Heart Rate

Embedded heart rate monitor.

Oximeter

Measure the amount of oxygen in the blood.
Protection
-
ATM Rating
-

ATM Rating

The ATM rating on smartwatches indicates their level of water resistance, which tells how well the watch can withstand exposure to water and various pressure levels.

3 ATM (30 meters): Suitable for everyday splashes, rain, and hand washing.

5 ATM (50 meters): Light swimming, showering.

10 ATM (100 meters): Swimming, snorkeling, water sports.

15 ATM (150 meters): Advanced swimming, water sports.

20 ATM (200 meters): Diving, deep water activities.

50 ATM (500 meters): Professional diving, excellent water resistance.
Waterproof
Hand Washing

Waterproof

Hand Washing

You don't need to remove your watch every time you wash your hands. The smartwatch is water-resistant, fully covering frequent washing, making it practical for every moment of the day.
MIL-STD-810
No

Battery

Battery Capacity
300 mAh

Battery Capacity

Most smartwatches have a battery capacity of around 200mAh. 2. The size of the battery is not always indicative of the autonomy, as this largely depends on the features of the smartwatch and the functions we have active. 3. For example, a smartwatch with a large color touch screen and 24-hour heart rate monitoring will often require charging even if it has a larger battery than a simpler smartwatch.
Battery Life
10 days

Battery Life

Battery life shows how many days the smartwatch can operate without charging.


It depends on the battery capacity, but also on how much you use it (e.g. active display, GPS, notifications, etc.).


For example, a smartwatch with 2-3 days of battery life is ideal for daily use with all features enabled.


Models with 5–10 days or more are suitable for those who do not want to charge often or use it more "lightly".


The value is especially meaningful when comparing products from the same manufacturer.
Standby Time
10 days

Standby Time

The amount of time a smartwatch can operate in standby mode, simply connected to a mobile phone with one charge. A typical average is 12 days, but it depends on what each manufacturer defines as standby mode. Size makes sense mainly in comparing products from the same manufacturer.

Dimensions

Case Size
40 mm

Case Size

40
This size is usually intended for fruits with a circumference of 14-16.5cm.

AI Features

AI Voice Assistant
No
AI Training Coach
-
AI Health Insights
-

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews (6)

4.5
6
4.5
Review this product
  1. 3
  2. 3
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1 star
    0
Review this product
  • Easy synchronization
  • Sufficient number of features
  • Accuracy in measurements
  • Construction quality
  • Durability
  • Battery life
  • Value for money
  • Comfort
  • Screen

Reviews photos

Reviews photos
Reviews photos
Reviews photos
Reviews photos
Reviews photos
Reviews photos

Reviews by our members

  • lascu_bogdan
    4
    lascu_bogdan
    This review is about the colour: Black
    Did you find this review helpful?
  • Angel_pap5263
    4
    Angel_pap5263

    Verified purchase

    This review is about the colour: Black

    For its price, it is excellent (I got it for around €40).
    Personally, I use it as a daily watch for the gym, etc., and it is very convenient for the stopwatch, music control, and notifications.
    Also, I like the design quite a lot as I wanted it to look as much like a regular watch as possible.
    Finally, another positive point, which I didn't expect, is that it has a very good speaker and microphone for calls.

    However, it has the following issues that personally annoy me:
    1) Firstly, for Instagram notifications, it doesn't show you who sent the message (though I don't know if this is a problem with the app itself or the watch).
    2) When you start recording an exercise, it doesn't let you use the watch for anything else except music control. It would be useful if you could also use the stopwatch, notifications, etc.
    3) You can't set it to silent (vibration) for incoming calls. Also, it's very annoying that sometimes, even after you've answered the phone, it keeps ringing until you stop it from the watch.

    Translated from Greek ·
    Did you find this review helpful?
  • thers1980
    5
    1 out of 1 members found this review helpful
    thers1980
    This review is about the colour: Black

    It does everything it promises. Strong battery, calls from the watch to 100 contacts. Heart rate, oxygen measurement, sleep, menstrual cycle, faces for all tastes. Notifications for many applications besides TikTok and Outlook. Overall very satisfied for a watch under 40 euros. 39.90.

    Translated from Greek ·
    Did you find this review helpful?
  • mari_john
    4
    3 out of 4 members found this review helpful
    mari_john

    Verified purchase

    Positives:
    1) It will definitely satisfy you with the updates you will receive. That is, the vibration for calls or messages will ensure that you do not miss notifications.
    2) Its speaker is extremely loud and you will hear it crystal clear, as well as its microphone.
    3) The battery seems to be quite good.
    4) It supports Greek letters, has a Greek menu.
    5) It has a pulse oximeter.
    6) The app is quite good to the point of being comparable to other more expensive ones.

    Negatives:
    1) It is difficult to read any notifications in Greek due to the difficulty in displaying them with the correct spacing. Of course, for €60 you can overlook this.
    2) Few options for backgrounds.
    3) Basic apps are missing as options to receive notifications (e.g., Outlook, TikTok).

    Conclusion:

    It is worth buying it on the condition that you spend a little money and purchase a product that so far seems more expensive.

    Translated from Greek ·
    • Easy synchronization
    • Sufficient number of features
    • Construction quality
    • Battery life
    • Value for money
    • Comfort
    • Screen
    Did you find this review helpful?
  • 5
    Antonis_Braoudakis6904

    Verified purchase

  • 5
    dimitrastathaki

    Verified purchase

    This review is about the colour: Black

    • Easy synchronization
    • Sufficient number of features
    • Accuracy in measurements
    • Construction quality
    • Screen
    • Durability
    • Battery life
    • Value for money
    • Comfort
  • lascu_bogdan
    4
    lascu_bogdan
    0
  • Angel_pap5263
    4
    Angel_pap5263

    For its price, it is excellent (I got it for around €40).
    Personally, I use it as a daily watch for the gym, etc., and it is very convenient for the stopwatch, music control, and notifications.
    Also, I like the design quite a lot as I wanted it to look as much like a regular watch as possible.
    Finally, another positive point, which I didn't expect, is that it has a very good speaker and microphone for calls.

    However, it has the following issues that personally annoy me:
    1) Firstly, for Instagram notifications, it doesn't show you who sent the message (though I don't know if this is a problem with the app itself or the watch).
    2) When you start recording an exercise, it doesn't let you use the watch for anything else except music control. It would be useful if you could also use the stopwatch, notifications, etc.
    3) You can't set it to silent (vibration) for incoming calls. Also, it's very annoying that sometimes, even after you've answered the phone, it keeps ringing until you stop it from the watch.

    Translated from Greek ·
    0
  • thers1980
    5
    thers1980

    It does everything it promises. Strong battery, calls from the watch to 100 contacts. Heart rate, oxygen measurement, sleep, menstrual cycle, faces for all tastes. Notifications for many applications besides TikTok and Outlook. Overall very satisfied for a watch under 40 euros. 39.90.

    Translated from Greek ·
    1
  • mari_john
    4
    mari_john

    Positives:
    1) It will definitely satisfy you with the updates you will receive. That is, the vibration for calls or messages will ensure that you do not miss notifications.
    2) Its speaker is extremely loud and you will hear it crystal clear, as well as its microphone.
    3) The battery seems to be quite good.
    4) It supports Greek letters, has a Greek menu.
    5) It has a pulse oximeter.
    6) The app is quite good to the point of being comparable to other more expensive ones.

    Negatives:
    1) It is difficult to read any notifications in Greek due to the difficulty in displaying them with the correct spacing. Of course, for €60 you can overlook this.
    2) Few options for backgrounds.
    3) Basic apps are missing as options to receive notifications (e.g., Outlook, TikTok).

    Conclusion:

    It is worth buying it on the condition that you spend a little money and purchase a product that so far seems more expensive.

    Translated from Greek ·
    3
  • 5
    Antonis_Braoudakis6904

    0
  • See all
39,90 €
14,00 €   shipping cost
HiFuture