Features1Long Lasting Endurance: Equipped with a built in lithium cell and 2000mAh large capacity design, this electric hand warmer provides uninterrupted warmth and is suitable for various indoor and outdoor activities in winter 2Constant Temperature: With advanced heating technology, and warmth can be felt in just 3 seconds. Combined with an intelligent constant temperature control system, to maintain the most appropriate heating temperature 3Graphene Heating Layer: Using graphene material to form a 360 degree stereoscopic heating layer, this electric hand warmer provides even heat distribution and higher efficiency, providing warmth for you at any time 4Comfortable and Cute: The outer shell of this hand warmer is made of skin friendly material, with a delicate and non irritating touch; Cartoon image design, better attracting people attention, is a warm solution in cold winter 5Security Design: Adopting 6 layer explosion proof security design and intelligent temperature sensing chip, once an abnormal temperature is detected, the guard mechanism will be activated to quickly shut down the powerSpecificationItem Type: Electric Hand WarmerMaterial: ABS, MetalBattery: Lithium Cell 2000mAh (built in)Charging Method: Type C InterfacePackage List1 x Hand Warmer1 x Charging Cable1 x User Manual