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