Smart Phone Bluetooth Watch Bracelet $ 21.33 Product information: Material: OGS Internal screen (display) Type: 1.54-inch IPS color screen Resolution: 240*240 Battery: polymer lithium ion Battery capacity: 150mAh Charging time: about 2H Shell material: zinc alloy material Bottom shell material: IML material Strap material: liquid silicone strap Speaker: 0916 welding wire Mike: 4015 welding wire Motor: support, 820 welding wire Heart rate chip: EM 7028 Sensors: optical heart rate sensor, 3D acceleration sensor Packing list: watch*1