• The rechargeable hand warmer can be fully charged in 2~3 hours. It can continuously warm your hands for 4~8 hours according to your setting of three adjustment heating levels,low (95~107°F), medium (107~118°F), high (118~131°F).
• The electric hand warmer is made of safety flame retardant material and high-tech aircraft-grade aluminum. Built in intelligent chip have been set with over-voltage, over-current, short circuit, overload, over-discharge protection program.
• Double side radian of the USB hand wamer perfect fits to the palm, 85% surface heating part helps to Rapidly warm up in seconds. Portable and compact size can be held in one hand with anti-skid shell.
• 5200mAh lithium battery hand warmer can also be used as backup power bank to charge your phone for about twice. It comes with Micro USB Cord,easily plug into 110V adapter,computer or laptop.
• Some customers use it to relieve the suffer of menstruation, Raynauds Arthritis disease and frostbite.It can be taken into your pocket for outside skiing, climbing, hiking, camping.

Shipping Note: Shipping to Alaska, Hawaii, P.O. Boxes, and APO addresses is not available for this item

Warranty: 90 Day Woot Limited Warranty