Features1. 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. SpecificationMaterial: Aluminum alloy, ABSColor: Blue, SilverSize: 10.2 x 5.8 x 2.3 cmWeight: 150 gBattery Capacity: 5200mAhInput / Output: 5V 1.5APackage Include:2 x Hand Warmers2 x USB Cable2 x User Manual