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SMA 09-3 Smart Watch how to connect with Android Smart Phone: https://youtu.be/7gO-WhIiTV8 SMA 09-3 Smart Watch how to connect with iPhones: https://youtu.be/Y22skdCXrgQ SMA-09 Smart Fitness Tracker Watch Chipset: MTK2502C-ARM7 Size: 44.5mm*44.5mm*12.2mm weight:120g Touch: capacitive touch screen Bluetooth: BT 3.0+4.0 Button: Power &Home key Battery: 300 mAh Talk time: 3 Hours Battery life/Standby time: 48 Hours Charging time: 2 hours Function: BT call, MSM/MAIL/Twitter reminder,Pedometer,distance counter, calorie consuming,Remote Camera,Bluetooth dialer, contacts, call reminder, clock, anti-loss, sleep monitor, sedentary reminder, calendar. Languages: English, Italian, German, Dutch, Spanish, French, Polish, Turkish, Portuguese, Russian Two Modes Dynamic Heart Rate Monitor: 1.Repeat: Monitor heart rate 24 hours a day. 2.Once: Real-time heart rate monitor. 22mm Replaceable strap: Standard 22mm watchband, you can replace it at will