Specification: Chipset: Realtel: MTK2502D Main frequency: 40MHz Memory RAM: 128KB, ROM: 128KB extend 128MB Size: 44*38*10.7mm Strap: Fit all 42/44mm straps Charger: Wireless charger Color: Black and White Screen: 1.75 HD IPS, 320*385 Touch Screen: 2.5D curved Capacitive full touch screen Bluetooth Version: 5.0 Battery: 280MAH Large-capacity lithium polymer battery Watch Languages: English (default), German, Spanish, Italian, French, Portuguese (Brazil), Russian, Indonesian, Czech, Thai, Dutch, Polish, Turkey, Malaysia, Vietnam, Greece. App Languages: Chinese, English, German, Russian, French, Spanish, Portuguese, Japanese, Italian, Polish ​ Function: Highlights Functions: IP68 waterproof, Thermometer, heart rate, ECG, BP, SPO2, 5th generation, 42/44mm changeable watch band, wireless charger, 1.75 inch display, 7 days battery life Bluetooth Push: SMS, WeChat, Email, Facebook news and other APP notifications reminder Heart Rate Monitor: Heart rate monitor, monitor your heartbeat 24 hours ECG: Analysis of ecg data Pedometer: Exercise steps, calorie consumption, exercise mileage record Sedentary Reminder: It's time to get moving and change your unhealthy lifestyle Sleep Monitor: Record and analyze your sleep status scientifically and quantitatively Find Phone: Anti - loss reminder. Two - way search Bluetooth Music : Control music Apps : FitcloudPro Other function: Alarm clock, calendar, stopwatch Packing: smart watch*1 / charging cable*1 / user manual*1 / original retail box*1