... to heat / light,safe and reliable.2.Fashionable and exquisite,the best choice for small gift.3.Small and delicate,portable,especially design ... micro-circulation, Easy cleaning,scientific and Environmental Protection.5.Working time: 4 hours for the highest temperature/5 hours for the ... .Battery:2600mAh Lithium ion 10.Accessories: Adaptor, USB cable Best quality and competive price with USB hand warmer