Kiplyki Intelligent Digital Display Control Hand Warmer Three Temperature Adjustment Rechargeable Portable Hand Warmer Features: The small hand warmer has four functions and has a wide range of applications. It can be a hand warmer to warm you up in the cool winter, it can be a massage To relieve pain caused by fatigue. Backside heating : Long press for 3 seconds to wake up the hand warmer heating function, no need to wait for a long time. In addition, it also has a Backside heating mode and a heating power of 5-10w, which will more heat to warm you on cool days. Built-in high-capacity battery up to 2000mah, small size and light weight, can be used as a portable charging power source, allowing you to conveniently charge your mobile phone for camping, hiking, climbing, and picnic. Smart LED digital display: The LED display will clearly show you the current temperature and the remaining power at different temperature , without you having to the current temperature and remaining power. Adjustable temperature: There are three temperature for you to control and adjust, the first level is 50 degrees Celsius low temperature, the second level is 55 degrees Celsius constant temperature, and the third level is 60 degrees Celsius high temperature. You can adjust the different temperatures between them as needed. Product Description: Product name: Hand warmer Color:Blue,White,Yellow Heating temperature: 50℃~60℃ Material: ABS, aluminum alloy Size:3.93*2.75in Weight:0.33lb Includes: 1x hand warmer 1x data cable Features: The small hand warmer has four functions and has a wide range of applications. It can be a hand warmer to warm you up in the cool winter, it can be a massage To relieve pain caused by fatigue. Backside heating : Long press for 3 seconds to wake up the hand warmer heating function, no need to wait for a long time. In addition, it also has a Backside heating mode and a heating power of 5-10w, which will more heat to warm you on cool days. Built-in high-capacity battery up to 2000mah, small size and light weight, can be used as a portable charging power source, allowing you to conveniently charge your mobile phone for camping, hiking, climbing, and picnic. Smart LED digital display: The LED display will clearly show you the current temperature and the remaining power at different temperature , without you having to the current temperature and remaining power. Adjustable temperature: There are three temperature for you to control and adjust, the first level is 50 degrees Celsius low temperature, the second level is 55 degrees Celsius constant temperature, and the third level is 60 degrees Celsius high temperature. You can adjust the different temperatures between them as needed.