Oura Ring 4 Ceramic Midnight is a smart device for health and sleep tracking, designed for everyday use. The product features cutting-edge tracking technology in the elegant Midnight version, made from premium ceramic material.

• Key features:
• Continuous sleep and recovery tracking.
• 24/7 heart rate monitoring.
• Stress and energy level tracking.
• Fitness tracker and daily activity monitoring.
• Women’s health tracking.
• Recovery and overall health insights.
• Built-in sensors for maximum comfort.
• High-performance ceramic design.
• 5-8 day battery life.
• Bluetooth connectivity.
• Compatibility with Android and iOS.
• Water resistance.

Technical specifications:

• Brand: Oura
• Model: Oura Ring 4 Ceramic Midnight
• Size: 4
• Product type: Smart ring
• Material: Premium ceramic
• Style: Minimalist
• Shape: Round
• Operating system: Proprietary Oura
• Connectivity: Bluetooth
• Heart rate monitor: Yes
• Heart rate measurement: Yes
• Sleep measurement: Yes
• Stress measurement: Yes
• Fitness tracker: Yes
• Women’s health measurement: Yes
• GPS: No
• Battery type: Lithium Polymer
• Battery life: 5 - 8 days
• Water resistance: Yes

Dimensions:

• Size: 4
• Inner diameter: approximately 14.9 mm
• Inner circumference: approximately 46.8 mm
• EU equivalent size: 47
• US equivalent size: 4

Package contents:

• 1 x Oura Ring 4 Ceramic Midnight Size 4
• 1 x Magnetic charger
• 1 x USB cable
• 1 x User manual

The Oura Ring 4 Ceramic Midnight Size 4 offers smart health tracking in a stylish and comfortable accessory, suitable for everyday use and an active lifestyle.