This pocket warmer is compact and still powerful enough to keep you warm for hours. It comes with built-in Li-ion batteries that can also be easily charged with the included AC adapter. It is perfect for cold winter days outside, to and from work, and anywhere else for convenient and quick heat. Plus, it can be repeatedly used about 500 times by charging it and equipped with "Battery remainder amount display function" in which timing of charge is understood.

• Can be used for 500 times
• Battery remainder amount display function telling you how much battery is left
• Charging time: three hours (exclusive AC adaptor use)