Specifications: Material: crystal super soft Color: dark gray Input: 5V2A Constant temperature: around 50C Power: 6W Heating area: 10*28cm Product unfolded size: about 30*50cm Features: 1.This smart thermostat hand warmer is made of crystal super soft material, which is soft, skin-friendly and breathable, comfortable to touch and easy to use. 2.Graphene heats up quickly, with a large heating area. The hot compress at a constant temperature of 50C will not burn the skin, and can effectively dispel cold and keep warm. 3.Washable graphene and crystal fabric, our hand warmers are washable, easy to keep clean and hygienic. 4.Equipped with a storage bag, our hand warmers are lightweight, foldable, and easy to carry, allowing you to enjoy comfortable warmth whether in the office or at home. 5.5V2A USB low-voltage power supply, no plug, built-in temperature sensor, when the temperature exceeds the set value, it will automatically stop heating, providing safety protection for your use. Packing List: 1*30*50cm hand warmer 1*English manual 1*Type-C data cable