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 usNotice:1.Actual color may be slightly different from the image due to different monitor and light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: ABS + electronic componentsSize: 8x7.9x3.26cmPower supply: USBBattery capacity: 5000mAh/7000mAh/ 10000mAhRated power: 5WHeating temperature: 42-55Charging time: about 3-4 hours