Connect the USB plug of the appropriate mobile device charging cable (not included) into the USB port of the hand warmer(Connect ﬁrstly with the USB C convertor to the Hand Warmer for the model 118s). The mobile device should begin to charge automatically. The BLUE Hand Warmer light(s) will illuminate indicating power status.
NOTE: While charging a mobile device, the heat functions are disabled to prevent overheating. Remove the device to allow heat functions to resume.