The smart LED display is cool, and you can check the current temperature or remaining power at a glance. The size is small and exquisite, very suitable for carrying around. 4000mah large capacity battery, 6 hours full charge, long storage time. It is safe to use, with a built-in intelligent system, which can effectively prevent overcharging, overheating, overvoltage, and short circuit. Used as a power bank to charge your phone many times. Colour: Green Material: Plastic Package Contents: 1 x hand warmer 1 x charging cable Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.