... .5*W27.5*H42mmSolar panel:0.2W single crystalline silicon solar cell, Shell material:Aluminum Cell:1.2V/600mAH NI-MH ... a long timeDisplay color:Red, yellow, blue, white, green.LED numbers:6 LED lightsVisual range:>500 metersWorking mode:Light- operatedRev control light ... and external lines.2.Energy saving, low power consumption, used solar power, low cost.3.Non Hazardous Substances, and not pollute ...