Description:*1. Shell Material: plastic*2. Size: 110 x 60 x 40 mm*3. Power Supply: USB charging*4. Rated Voltage: 2A*5. Rated Power: 5V*6. Battery Capacity: 2400mAh*7. Heat: 3 settingsFeatures:*1. 3 levels of temperature control with double-sided heating, you can choose the best temperature according to your needs, even in the cold days can also make your hands stay warm.*2. USB charging is fast and convenient, when the power runs out, just plug in the USB cable to recharge the 2400mAh battery, also, the heating body uses ceramic heat dissipation technology, heat retention time can last about 5 hours.*3. 2-in-1 hand warmer, can also be used as a power bank to charge your cell phone, can be carried in one hand, or in a pocket, can be used to warm hands, feet, knees, belly. You can carry it with you during sports, fishing, hiking, camping, skiing, traveling, or outdoor sports.*4. No need to fill water, safe and explosion-proof, automatic power-off protection, intelligent temperature control system to prevent overheat.*5. It is the perfect gift for family and friends to spend a cold winter.Package Includes:1 x Hand Warmer1 x Charging Cable1 x Manual1 x Storage Bag