- Not only charger but warming hands - For Nokia, Sony Ericsson, Mini USB jack, etc - Rechargable times: More than 500 times - Charger & warming hands for cell phone & MP3 & MP4- High capacity: 2600 mAH, 3.7VDC- The temperature of back metal reaches 45 Cel. Degrees- The temperature of back metal is adjustable through the switch- The charging & warming hands time reaches 7 hours