Features 1 . SAFE AND COMFORT: Made of high-tech aircraft-grade aluminum and ABS material, anti-scald, explosion-proof . This mini hand warmer have built-in intelligent protection system is provided with safeguard of power on, short circuit and over loading . 2 . HAND WARMER & POWER BANK 2-in-1: This Hand Warmers really helps warm up your cold hands and gets the circulation going, great for relief of aches & pains . Best Gifts for Friends and Family in cold winter . 3 . QUICK WARM HANDS & 3 LEVELS: Press the switch and instantly release the warmth for you . Rapidly warm up double sides in seconds . Three levels of temperatures: Low: 104F, Medium: 122F, High: 140F at your choice . 4 . LARGE BATTERY CAPACITY: 5200mAh capacity can give a full charge to mainstream digital devices on market, the blue light will show how much charge is left . 5 . POCKET SIZE: Small and light . Handy carrying anywhere with any pocket or bag while sporting,fishing, hiking, camping, skiing . Specification Material: Aluminum alloy, ABS Color: Blue, Silver Size: 10 .2 x 5 .8 x 2 .3 cm Weight: 150 g Battery Capacity: 5200mAh Input / Output: 5V 1 .5A Package Include: 2 x Hand Warmers 2 x USB Cable 2 x User Manual