Specification: Features: 1. EXQUISITE COMFORT - Made of ABS materials, thousands of polished exterior materials that ensure safety, have an absolutely excellent touch feeling. Smooth, warm, portable, compact and non-slip with one hand. 2. Rechargeable and reusable hand warmer USB with large battery capacity - 5000mAh/7000mAh/10000mAh batteries can ensure a long service life. It can also be used as a mobile power source to charge your electronic devices at any time. 3. Portable power banks- smaller and more portable than power banks. This large power hand warmer charges your phone anywhere, anytime. Suitable for outdoor, fishing, hiking, camping and golf, as a warmer solution and power banks in cold weather. 4. The perfect gift for the cold winter. Our modern and comfortable power banks hand warmer will provide you and your loved ones with warmth in this cold season. 5. If you have any question, please feel free to contact us Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: ABS electronic components Size: 8x7.9x3.26cm Power supply: USB Battery capacity: 5000mAh/7000mAh/ 10000mAh Rated power: 5W Heating temperature: 42-55°C Charging time: about 3-4 hours Package List: 1x Hand Warmer