Ultrahuman Ring Air Size 10 Matte Grey

Track your health around the clock with this Ring Air fitness tracker in size 10 Matte Grey. Designed to be worn on your finger, this sleek titanium ring connects to both iPhones and Android devices via Bluetooth 5.0. It monitors your circadian rhythm, temperature, and can even predict ovulation while detecting caffeine windows and potential AFib. The impressive battery lasts 4 to 6 days on a single charge, and you can wear it worry-free in water up to 100 meters for 12 hours. Comes with a 1-year warranty. Model 170137.