it does its job although for this price I didn't expect it... it might have some deviation in measurements but that's debatable

Low signal strength, not for concrete houses, Line of sight situation pretty much, Keeps loosing connection.

The only problem is the measurement of the internal temperature, which is 1.3°C higher than I calculated with the three external thermometers.

I am not sure about the accuracy of its measurements, as the smart dehumidifier I have in the same room says different things. However, in the first few days when I had all the data in the same space, there was minimal deviation (<1% in humidity and <=1 degree in temperature). The signal has never been lost, both for the data I have inside and outside. Unfortunately, the screen is not readable from a distance or at an angle. The numbers are very small in the small details anyway, but it's a shame that you have to go close to the main station to see them.

Update 2024-05-14: The outdoor station takes a long time to record real measurements after rain. It wasn't like that at first. One of the two indoor stations, without taking it somewhere further away, stops giving a signal to the main one for no reason, and you have to rescan to reconnect.

It measures outside, greenhouse, children's room, and inside. So far everything is good. On one side it measures about 20 meters, on the other side about 4 meters sometimes loses its signal.

The first of the 3 channels on the main screen shows completely wrong measurements (5 degrees instead of 17). It doesn't even synchronize with the sensor. I tried all the sensors on this particular channel, and it doesn't synchronize with any of them.

Edit: After 1-2 days, the channel synchronized on its own.

With four different sensors placed in three rooms and one outside, I am fully covered. The measurements are generally reliable. The only thing it lacks to be perfect would be a clock/date and a backlit screen. However, for its price, I have no complaints.

The screen is so-so when viewed from angles (you have to focus on a specific point to see black)(otherwise it blurs) 9 out of 10, as for the humidity measurement it's okay, the temperature fluctuates by + - 0.8 to 1 degree. The sensors also have a deviation of up to 1 degree (I don't think anyone will see the same temperatures on all 3) in relation to each other and to the unit. If all these are not a problem, it is definitely worth the money. It also takes a sample every 20 to 30 seconds so that we can quickly see the changes. The range is satisfying. First, we put batteries in the unit, wait a few seconds, and then put them in the sensors. It's my first day with it, everything is fine

Very good range. It covers a 130sqm house with continuous updating on the central unit.
Moderate meter deviation is acceptable.
To check it, I had both units next to each other in a room with a closed door, and every time I went to check, they had a deviation between them like in the photo. For example, the middle meter constantly had a 1-degree difference with the right one.

Overall, the experience with this thermometer is very good and it is worth its money. However, I have noticed 2 negatives. Firstly, one out of the three devices has a deviation of one whole degree from the other two, which I consider significant. Secondly, in its measurements, it only retains the highest and lowest values in temperature and humidity. For example, if one night it is -9 and the next night it is -8.7, the thermometer will only retain the first measurement as it is the highest, failing to inform you about the equally low temperature of the next night

Unfortunately, the three mobile units have a deviation of one unit from the actual temperature, and sometimes even between each other. The internal temperature has a standard deviation of 2 degrees from reality. With this in mind, you achieve the real temperatures, but in any case, it is annoying.

Unreliable measurements with exclusions (in all sensors), while all 4 are next to each other. The manufacturer's official response in communication is that "at this price level" deviations of +-1°C (which may reach up to 2°C) and +-5% in humidity percentage are expected without considering their products as defective.

I don't think that someone buying something at this price expects an exclusion of 0.1°C and 0.5%, but certainly something less than what Bresser considers acceptable. Especially when we are talking about measurements in household spaces where a difference of 1 degree Celsius has its value.

I do not recommend buying it.

Each unit connects very easily to the central one and is so precise that when you hold it in your hands, the temperature changes... even the humidity. Pay attention to the channels you will set the unit to transmit on so that they do not interfere with each other

Other than that, Friday's milk is great. Indications are all over the place, one out of the 4 is connected to the main one. The settings fit perfectly... All good!!!

By placing the central unit and the receivers side by side, they displayed four different temperatures and humidity levels. There is not a significant deviation, but 2-3 degrees is enough, and 5-8% in humidity. If I want to see approximately what temperature it is outside, I simply open the balcony door. There is no need to spend 30 euros on this. Also, the units constantly disconnect. Sometimes one, sometimes all, and you have to unscrew the tiny screws they have to remove the batteries.

A fairly good and reliable construction. The negative aspect is that the screen is not easily readable, especially at night, as it does not have any light or night mode. If it had a clock, it would be simply excellent. However, for its price, it does a good job and accurately measures in 4 different areas of the house. Occasionally, one of the three indicators on the main screen is lost, but this is in a 120 sqm house with two floors, and the specific room where the sensor is located is the most remote. For its cost, it is good enough to give you an idea of what is happening in the rooms and spaces of your house.

I bought it for 29 euros. Very good price for 3+1 stations. I have the main one in the living room, one outside, and 2 others in rooms. The range is good, especially one room is essentially behind 3 walls and a door but it's not an issue. Satisfactory accuracy of +-0.3 from the actual values.

It is very good and practical, now for accuracy in measurements I haven't looked into it but it is sensitive to temperature changes. It is easy to use and has moderate build quality with few options! It is worth its money and I will buy a second one in the near future.