Maximum charging voltage: 5.0VCapacity: 650mAHStandby time: 1-3 daysCall time: 4 hoursVoltage: 3.7VMaterial: polymer batteryDisplay Type: IPSSize feet: 1.4'’Pixel: 240*240Capacitive touch screen: CTP capacitive touch screenContact: Support for configuring 10 home numbers, allowing speed dial and menu search to make callsWaterproof life (you can wear and wash your hands in the rain, but don't put it in hot water or swim)