Smooth and warm, portable and compact as well anti-skid in one hand. With USB charging port ensures a long using time. It can also be used as a power bank to charge your electronic device at any time. 3 seconds to heat up, no need to wait for warmth, built-in high-quality heating element, heat up faster. Quick hand warmer & Power bank 2-in-1. It's not only a little handwarmer but also a emergency backup battery. Great gift for girls, kids, youth, boys mens, women, elder. It is a nice size to hold and feels smooth in your hands. Handy carrying anywhere with any pocket or bag while sporting,fishing, hiking, camping, skiing, travel or play sports outdoors. Specification: Material: ABS Plastic Size Chart: 10000mAh: 148x50mm/5.83x1.97inch 5000mAh: 136x40mm/5.35x1.57inch Package Includes: 1 Piece Hand Warmers 1 Piece Charging Cable 1 Piece Manual 1 Piece Lanyard Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!