Solar Panel:Mono-crystal,multi-crystal,non crystal silicon Solar Panel:Mono-crystal,multi-crystal,non crystal siliconPower:2.5V/40mAh Current:40mA Voltage:2.5VBuild in Ni-Cd battery:500mAhLifetime of LED lamp is over100, 000 hoursUnit size:42.5cm(Height)×12.5cm(Diameter)Body materials:Stainless steelInstallation Available:Insert into the earth,fit on the cement ground or on the wall