Features：   Led digital screen: Smart led display is cool to check current temperature or how much energy left at a glance.   Easy to carry: Its slim and compact size fits a lot in your hand, making it perfect for carrying anywhere.   2 in1 functions: 4000mah large battery capacity, a full recharge within 6 hours can keep your hands warm all day It can also double as a power bank to charge your phone multiple times.   Perfect gift: Still confused what gift to give to your parents, lovers or friends? Hand warmer is the best choice to bring warmth and love to them in cold winter.   Safe and intelligent: Safe to use, the built-in intelligent system provides effective protection against overload, overheat, overvoltage, short circuit.       Specification：   Material: PC+Aluminum Alloy   Optional colors: Black/Green/Pink   Size: approx.9.6x7cm/3.74x2.75in   Rated voltage: 5V1A   Rated power: 5V1A   Battery: 4000mah   Power supply: USB   Optional colors: Black/Green/Pink   Quantity: 1Pc      Note：   Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.   Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you       Package Contents：   1xMini Hand Warmer (other accessories demo in the picture is not included.)