Qihang(TM) Fashion LED Bluetooth Bracelet Watch with Vibration, waterproof , Pedometer, Sleep monitoring, Time Display , Digital Time Display Host material ABS Wrist strap TPU Black Color (Black) NEW Design Bluetooth Bracelet Vibrating Wristwatch Watch Digital time ScreenOLED MaterialProduct Material :ABSWrist Strap MaterialTPU External Dimension69.1mm *15.8mm *11.2mm The Bluetooth bracelet with clock works as a timer Standby time72h Bluetooth Standard4.0+EDR Application Functionwaterproof/Pedometer/Sleep Monitor/Bluetooth/Ultra-long standby time/Low radiation/Chinese&English