Display Screen: 1.39" Full Touch Color Screen BT Version: V5.3 Material: ABS/PC/Zinc alloy Battery Capacity: 300mAh Battery Type: Lithium polymer Rated Voltage: 5V Charging Time: 3 Hours Normal Usage Time: 6 Days Waterproof: IP68 Standby Time: More than 21 Days Watch Size: 48.3*12.2mm (without strap) Weight: 74.73g (without strap） *oraimo Lab test results