Waterproof Design: Whether washing hands or daily use, you don't have to worry about water ingress into the watch Bluetooth Phone Call: After connecting with phone's Bluetooth, you can answer phone calls through the watch. If you don't want to answer the call, you can hang up the call directly on the watch. The mobile App will display the incoming call and vibrate to remind you Health Monitoring: 24h blood oxygen measurement, sleep monitoring, etc Multiple Sports Modes: Supports about 10+ sports modes and can connect to your phone to record daily activity data, such as steps, calories, distance and activity time Specification: Screen: 1.54-inch screen Resolution: 240*240 CPU: PAR2860 Bluetooth: BLE5.0 Heart rate sensor chip: HX3301 G-sensor: DA215S Touch type: full-screen touch Button: 1 physical button Battery capacity: 200mAh Charging time: 2 hours Standby time: 10 days Usage time: about 5-7 days System support: Android 4.4 and above and iOS 9.0 and above, for iPhone 5S and above Body material: Plastic (ABS+PC)/black texture Strap material: TPU Machine size: 40.5*36*11.3mm Strap size: 20mm Weight: 34g Waterproof level: IP67 Supports 11 sports modes: walking, running, badminton, mountain climbing, table tennis, cycling, football, basketball, plank support, rope skipping, yoga Other functions: sleep quality monitoring, heart rate, step calorie distance, music control, call rejection, exercise track, exercise track GPS, raise your hand to light up the screen, call reminder, SMS reminder, anti-lost reminder, alarm reminder, sedentary reminder, stopwatch, countdown, App reminder, do not disturb mode, disconnection reminder, remote photography, find bracelet, find mobile phone, format switching, heart rate alarm social sharing, alarm setting, bracelet brightness adjustment, health sharing (WeChat, QQ, Facebook, Twitter, WhatsApp), etc., main interface style switching