UMIDIGI Uwatch 3S Smartwatch Features Heart Rate Monitoring Real-Time Heart Rate Monitoring. Automatically test your heart rate every ten minutes, and form an analysis chart in Da Fit app, allowing you to view your heart rate changes at any time. Sleep Monitoring Uwatch 3S can automatically detect your sleep quality. Analyze the deeply and lightly sleep for you, so that you can better know your own sleep state and develop good sleeping habits. Helping you establish a regular bedtime routine. Sport Functions 14 sport modes(Walking, Running, Cycling, Badminton, Basketball, Football, Treadmill, Exercise, Climb, Tennis, Yoga, Dance, Skipping, Training), Count steps, distance, calories burned Other features:Multi-language support, alarm, personalized watch face, pre-set watch face, weather forecasts, wrist detect, timer, stopwatch, phone alarm and notifications, incoming calls, message notifications, calendar notifications, app notifications, find my phone, target reaching reminder, remote music control, remote photography, battery level display, female health tracking. 5ATM Waterproof Uwatch 3S passed 5ATM waterproof test, which is more strict in waterproof grade than IP68. You can wear it when swimming and washing hands because of the superior waterproof ability, and don’t need to take it off frequently. Message/Call Notification After connected to your smartphone in the Da Fit app, Uwatch 3S will vibrate to notify you for most communicating apps like Facebook, Whatsapp, Skype, YouTube, Twitter, Instagram, etc. (Can't reply messages.) Female Health Tracking By setting the detailed information of the menstrual date in the Da Fit app, it will remind you of your next menstrual and ovulation period and help you better understand your physical condition. Weather Forecast The weather conditions and temperature for the days are simply forecasted, making it easy for you to know what to expect in your daily life. It will be a thoughtful helper for traveling, dressing, exercising and travelling in your daily life. Find Your Phone After connecting the smartwatch to your phone, you can locate your lost phone through your watch and easy to find it. Similarly, you can also find your watch through your phone. Music Control Control the music App of your phone, you can select last/next Song. No need to take your phone out of your pocket, free your hand and let you enjoy every minute when on the go. Dimensions Diameter:44mm Thickness:12.9mm Weight:25g (without the strap) Water Resistance Rating:5 ATM Display Display type:Color TFT LCD touch display Screen size:1.3" Resolution:240*240 Touch screen:2.5D tempered glass with anti-fingerprint coating Watch case & strap Button:Single touch button (wake up, go back) Watch case material:Aircraft-grade aluminum + plastic Wrist strap material:Skin friendly TPU Wrist strap type:Removable wrist strap Wrist strap width:22mm Sensors PPG heart rate sensor Relative SpO2 sensor 3-axis acceleration sensor 3-axis geomagnetic sensor Wireless connectivity BT5.0 BLE Battery Battery life:Daily use mode: 15 days, Standby mode: 40 days Charging type:2Pin Pogo Pin Charging time:≤ 2.5 hours App:Da Fit System requirements:Android 4.4, iOS 8.0 or above