A great ring for sleep monitoring and unnoticeably comfortable!

Has been opened but unused, in brand new condition!.
Any questions at all happy to help!

The Oura Ring 4 silver Size 8 is a smart ring sleep fitness tracker made of titanium. It features a variety of sensors including an accelerometer, and provides measurements for heart rate, time, calories, and distance. The ring has a battery life of up to 7 days and is water resistant, making it suitable for indoor and outdoor activities. It is compatible with iOS and Android operating systems, and has features like multi-sport tracking, wireless connectivity via Bluetooth, and a rechargeable battery. Perfect for fitness enthusiasts looking to track their activities and monitor their sleep patterns.