Slide your hands into the open sleeves of our hand warmer heated bag. Its soft flannel cover keeps heat inside and keeps your hands warm all the time. One-button , 3 temperatures are available for you to choose from, lightweight design, can be used at home or in the office, dormitory, and school. Features - ColorPink - Outer layer material: Flannel - Inner material: Graphene carbon fiber - Size: About 26.00X16.70X2.00cm/10.22X6.56X0.79in - : USB - Rated power: 5 W - Rated voltage: 5 V - Power supply: 5V/1A - Temperatures levels: 55 degree centigrade, 45 degree centigrade, 40 degree centigrade - Comfortable material: The surface of the hand warmer is flannel, which is skin-friendly and comfortable to the touch. - Rapid heating: The graphene carbon fiber heating system heats up rapidly within 1 minute. It can also be warm in winter. - 3-Level heating settings: 3 Temperatures are available for you to choose from (55 degree centigrade, 45 degree centigrade, 40 degree centigrade) to meet your needs. - USB Charging: Connect the USB plug directly to your power bank or plug it into an outlet, computer host, car charger, etc. - Easy to use: One-button , lightweight design, keep your hands/abdomen/feet or another part get warm on cold days. Package list: 5 x Electric Heating Bag