Screen Type:TFTScreen Size:1.69 inch (240 x 280)Operating mode:Full TouchBluetooth Version:Bluetooth 5.1Waterproof:5 ATMRAM:64KBROM:512KBCell Type:Lithium PolymerBattery size:200mAhCharging time:2-3 hoursStandby time:> 120 hoursCompatability:Android 5.0 & Apple iOS 9.0 and aboveCase:Metal Zinc AlloyStrap:TPUShape of dial:Square