Description:1. The gasoline spray surface is smooth, comfortable and skin-friendly, enjoy the warm moments.2. Not only a hand warmer but also a power bank, 4000mAh large capacity can be used for emergency charging of mobile phones, USB interface can use any mobile phone.3. Hand warming mode: long press the right button for 3 seconds to turn on the double-sided heating function, and the current temperature is displayed at the same time. Power bank mode: press the button on the left to turn on the power bank function4. The hand warmer is not only beautiful and elegant, but we also pay attention to the consumer experience. The compact body size has been carefully calculated and carried with you. The shape fits the natural curve, and 45-60 degrees gives you just the warmth.5. About 4 hours long stay warm, the low temperature range is 45°≤4 hours, and the high temperature range 60°≤2 hours.Specification:Name: Hand WarmerMaterial: PC, aluminum alloy, fuel injectionSize: about 95*70*25mm/3.74*2.76*0.98inchPower: 10-15WBattery: 4000mAhGear position: two gear switchConfiguration: gift packaging and data cablePacking List:Hand Warmer*1Data Cable*1Description:1. The gasoline spray surface is smooth, comfortable and skin-friendly, enjoy the warm moments.2. Not only a hand warmer but also a power bank, 4000mAh large capacity can be used for emergency charging of mobile phones, USB interface can use any mobile phone.3. Hand warming mode: long press the right button for 3 seconds to turn on the double-sided heating function, and the current temperature is displayed at the same time. Power bank mode: press the button on the left to turn on the power bank function4. The hand warmer is not only beautiful and elegant, but we also pay attention to the consumer experience. The compact body size has been carefully calculated and carried with you. The shape fits the natural curve, and 45-60 degrees gives you just the warmth.5. About 4 hours long stay warm, the low temperature range is 45°≤4 hours, and the high temperature range 60°≤2 hours.