Adjustable temperature mode: The rechargeable hand warmer gives you instant double-sided heating in seconds. 3 levels 40C/104F-50C/122F-60C/140F depending on your choice. Portable mobile power supply: with 1000 mAh high capacity lithium battery. Can also be used as a mobile power source to charge electronic devices while fishing, hiking, camping or skiing. Intelligent instant heating: the hand warmer's adjustable upgraded and optimised circuitry ensures long and safe use. Charges in 3 hours and lasts 12 hours. Light up the torch in the dark. Warm up your kids, the elderly, all your cold winter friends The perfect gift: a must-have for cold winters, you can warm your hands, feet, knees, waist and tummy in the cold. Lightweight enough to carry in your pocket or hold in your hand. Use as a gift for Thanksgiving, Christmas, family gatherings and birthdays.