Display Screen: 2.01'' TFT 240*282 Wireless Version: V5.2 Battery Capacity: 300mAh Battery Type: Lithium polymer Battery Charging Time: 3 hours Normal Usage Time: Up to 7 days Standby Time: 30 days Watch Size: 53.4*39.1*11.5mm (without strap) Weight: 41g (with strap) Material: ABS/PC/Silica Gel Waterproof: IP68 Model: OSW-801