electric hand warmer 48 degree Single temp. 3 hrs warming time. LED indicate using status. Voltage:100-240V battery hand warmerhand warmersUsb warmer,Hand warmer massageLover USB hand warmer rechargeable christmas gift hot pad green touchUsb warmer,Hand warmer massage Voltage:100-240V, two kinds charging: power charger, USB charging. user-friendlier designUsb warmer,Hand warmer massageUsb hand ...