1、Double Sided Rapid Heating: Featuring innovative double sided graphene heating technology, this electric hand warmer heats up in just 5 seconds. Its compact and lightweight design allows for easy storage in your pocket, and the included leather strap ensures both style and safety, preventing loss. 2、2 Level Intelligent Temperature Adjustment: Equipped with a built in smart chip that supports two temperature settings, this portable hand warmer quickly adapts to different warmth preferences. With the addition of constant temperature control, it ensures a continuous and comfortable warmth experience. 3、Safe And Explosion Proof: Integrated with advanced safety guard systems, including intelligent chip monitoring and explosion proof safeguards, this electric reusable hand warmer guarantees no worry usage and peace of mind during operating. 4、5 Second Rapid Heating: Utilizing efficient graphene heating technology, this rechargeable hand warmer provides instant warmth in just 5 seconds, delivering rapid response to your heating needs without the need for long waits, suitable for staying warm during cold seasons. 5、Comfortable Hand Feeling: This portable electric hand warmer is made of excellent quality ABS, PC and aluminium alloy material, which is sturdy and long lasting, with slick and flat surfaces and good hand feeling. Item Type: Rechargeable Hand Warmer Battery: 5000mAh Li Battery (Included) Charging Method: Type C Interface Material: ABS, PC, Aluminum Alloy 1 x Hand Warmer 1 x Charging Cable 1 x Manual 1 x Leather Hanging Rope