SpecificationS Display Screen: 1.43" AMOLED BT Version: V5.3 Material: ABS/PC/Liquid silicon/Stainless steel Battery Capacity: 470mAh Battery Type: Lithium polymer Rated Voltage: 5V Charging Time: 3 Hours Normal Usage Time: 25 Days Standby Time: More than 67 days Watch Size: 48.7*15mm (without strap) Weight: 88.35g (with strap） Waterproof: 3ATM *oraimo Lab test results