Adjustable temperature mode: rechargeable hand warmers provide you with instant double-sided heat in just seconds. 3 levels of temperatures 40C/104F-50C/122F-60C/140F according to your choice. Portable power bank: equipped with a lithium battery with high capacity of 1000 mAh. Also works as a power bank to charge your electronic device in an emergency when fishing, hiking, camping or skiing. Intelligent instant heating: hand warmer adjusts the upgraded & optimised circuit to ensure safe use for a long time. Charges 3 hours, long lasting 12 hours. A torch to light up the dark night. Warm your children, seniors, friends in all cold winters! PERFECT GIFT:A must-have for the cold winter, you can warm your hands, feet, knees, waist and stomach in a cold environment. Lightweight, it can be put in a pocket or held in your hand. Used as a gift for Thanksgiving, Christmas, family gatherings and birthdays. Intelligent application: LED torch lights up your night. High frequency vibration massage and hot compresses can help reduce fatigue and relieve pain.