1.Dual-side heat,high-capacity 2.keep your hand warm 3.Charge your mobile,MP3/4 etc 4.Lithium-ion rechargeable battery 1. With an 4400internal Lithium –ion rechargeable battery, could be recharged up to 500 times.2. Use PET as the heating material3. Two functions: warm your hands and charge kinds of digital products, such as mobile phone, camera, Ipad, Iphone, PSP, etc. 4. Heats up in 30 seconds ...