All new, all in one, all for your fitness and health. This Letsfit IW2 LCD Smart Watch allows you to measure your Sp02 levels with ease, giving you deeper insights into your fitness and health. Sp02 (oxygen saturation level) indicates how well your body absorbs oxygen and how much oxygen is delivered to your blood. It also monitors your heart rate 24/7, tracks up to 10 sports modes, and records your sleep. Find all your fitness data, health breakdown, visualized analysis, and many more functions right on the Letsfit app. This smartwatch is 5ATM waterproof, so it’s protected against splashes, sprinkles, sprays, splatters, and everything in between.