The Wellue O2Ring™ Ring Oxygen Monitor is a continuous pulse oximeter designed for monitoring oxygen levels, pulse rate, and motion during sleep. It has a compact form factor with dimensions of 1.5'' x 1.2'' x 1.5'' and is lightweight at 0.53 oz / 15g. The device is rechargeable with a 2-3 hours charge time and has a built-in memory for up to 4 sessions, each lasting up to 10 hours. The OLED display shows data in real-time, recorded in the app with a 4s display interval. This innovative ring-shaped oximeter is perfect for family medicine and comes with a 1-year manufacturer warranty.