1、Adjustable Modes: 3 heat levels (40℃/50℃/60℃), whether you need gentle warmth for daily use or a high heat blast to combat freezing conditions, just 5s fast heating, our electric hand warmers have you covered. 2、Multi-functional Accessory: Our rechargeable hand warmers also double as a handy power bank, you can charge your devices on the go. It is also a fire ambient light for your home, car, or office environment. 3、Safety and Reliability: Our USB hand warmers have passed the safety certification and use premium chipsets to stop overheating and ensure worry-free use. And a digital LED display to check the current heat level. A skin-friendly from premium ABS material. Within a mere 5 seconds, this electric hand heater can be heated, offering 3 heating levels to cater to your unique comfort preferences. The innovative heating design promotes your hands staying cozy and protected from the harsh winter chill. Ideal for various activities such as exercising, fishing, golfing, hiking, camping, skiing, traveling, or any outside sport. Features: Adjustable Modes: 3 heat levels (40℃/50℃/60℃), whether you need gentle warmth for daily use or a high heat blast to combat freezing conditions, just 5s fast heating, our electric hand warmers have you covered. Multi-functional Accessory: Our rechargeable hand warmers also double as a handy power bank, you can charge your devices on the go. It is also a fire ambient light for your home, car, or office environment. Safety and Reliability: Our USB hand warmers have passed the safety certification and use premium chipsets to stop overheating and ensure worry-free use. And a digital LED display to check the current heat level. Portable Design: The hand heaters are lightweight and fit comfortably in your hands. Slip them into your pockets or bags and take our pocket warmers with you wherever you go, for traveling, camping, skiing, etc. A Thoughtful Gift: Show your loved ones you care by gifting them these reusable hand warmers - a practical and thoughtful present for the winter or Christmas season. It's a must-have to spend a cold winter. Specifications: Color: White, Black, Green (Optional) Type: 3600mAh, 5000mAh (Optional) Material: ABS+Aluminum Alloy Item Size: 102 * 61 * 30mm/4.02 * 2.4 * 1.18in Item Weight: 130g/4.59oz Package Size: 104 * 63 * 41mm/4.09 * 2.48 * 1.61in Package Weight: 160g/5.64oz Packing List: 1*Hand Warmer 1*USB Cable 1*Hand Warmer 1*USB Cable