NO.1 F3 IP68 Waterproof Sleep Monitor Pedometer Sport Fitness bluetooth Smart Watch for IOS Android

English User Manual please click here: http://img.banggood.com/file/products/20180914024131SKU703404F3UserManual.doc General Specification Brand NO.1 Model F3 Color Black-Blue; White-Orange; White-Blue; Black-Red; Compatible OS German Dialog DA14580 (the world's lowest power ring chip) bluetooth Version bluetooth 4.0 Weight 53g Size 43.5*45.5*13.2mm Special Features Waterproof IP68 waterproof (waterproof in 30-meter water) Sports Tracker Running,Jogging,Weather,Barometer,Stopwatch,Altimeter etc. . Sleep Monitor Support Pedometer Support (Exercise step, calorie consumption, movement mileage record) Remote Camera Support bluetooth Push Support (Caller, SMS Messenger, app news reminders) Exercise Plan Support Call alert Support Technical Parameters Screen Type: 1.1 inch Round display Battery Capacity: Button Battery Band Material: Two-color silicone strap Screen display Aways on Package Included: 1* NO.1 F3 Smartwatch Bracelet Q: after change my battery but doesn't work? please note it: