This product is designed to supply power for outdoor 12V applications. You will enjoy convenient electricity wherever you go. Feature: Compact designed With blinking charging indicator to give a clear view that the generator is working. With detachable connectors for different application, like battery clamps, cigarette lighter plug. With built-in diode to prevent reverse charging. Can charge a wide range of applications, or as an independent power source for outdoor activity like camping, exploration. Specification: use Amorphous silicon solar cells (11 1/2" x 3 1/2") Power: 2 Watts max. Working voltage: 12V max. Working current: 150mA max. Dimension: 13 1/2" x 4 3/4" x 7/16" Net weight: 14.5 oz.