Hand warmer, Portable hand warmer, Rechargable Hand warmer, usb hand warmer,with Emergency Charger Hand warmer, Portable hand warmer, Rechargable Hand warmer, usb hand warmer,with Emergency ChargerCan be fully rechargabled in approximately 3 hoursdeliver ... ask can use as cell phone chargerPower: 2W. Volt: 3V.Battery Capacity: 1800MASize: 84 x 62 x20mmPacking: 1pc/Gift Box USB hand warmer