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