Thank you for coming to our shop, I hope it is to your satisfaction Category: Smart Bracelet Material: Metal + Tempered Glass + TPU Screen Size: 0.96inch Resolution: 128*96 Battery Capacity: 90mAh (C more→ontains) Standby Time: 20 Days Using Time: 6-7 Days CPU: SYD8810 Heart Rate Monitoring: PPG (SC7R30) RAM: 32KB S-Flash: P25Q16H G-sensor: SC7A20 Motor: Cylinder Antenna: FPC Antenna Charging Interface: Standard USB Interface Button: Single-touch Compatible System: for Android 4.4 and above, for iOS 8.4 and above Functions: Time Display, Pedometer, Calorie, Distance, Multiple Sports Modes, Raise Hands to Brighten Screen, Sleep Monitoring, Motion Track, APP Support, Call/Information Reminder,