Double-sided rapid heating: The hand warmer is made of ABS and heats up in seconds. Just press the switch to turn on the heating state and enjoy warmth in the cold winter.
Fast, Adjustable Heating: Preheating only takes less than a minute and the heating temperature can be changed each time the switch is pressed; two levels of temperature adjustment, the first level is 50°C and the second level is 55°C. 1200mah can be used for about 90-180 minutes. 2400mah can be used for about 180-360 minutes.
