Chips: SF32LB551, App Wearfit pro Bluetooth: V5.0+3.0 Material: Aluminum alloy+ IML Waterproop IPX 68 Net weight: 54.8g (with watch band) Screen size: 2.02 inch , 320*390 pixel Battery: 300mAh, 3.7V charging time 2.5H, Working time Brand WiWU Item SW01 S9 Waterproof IP68 Chip SF32LB551  APP: Wearffit Pro Material Aluminum alloy+ IML Net weight 54.8g (with watch band) Screen size 2.02 inch 320*390 pixel Battery 300 mAh, 3.7V charging time 2.5 Hours Working time 10 days Standby time 150 days