electric hand warmer 1.Jack plug:usb 2.With CE and Rohs 3.Have patent in China 4.FOB USD:4 electric hand warmer1 ... )color:Red,Orange,Yellow,Pink,Purple, Blue, Green & Clear 2)usage:To charge the electric warmer for about ... preservation 2-10 hours PVC hot pad in any custom shape. It is good warming product in winter and lovely items ...