... polycrystalline silicon,60WBattery:specilized for solar,80AH,12VController:time-control,over-current,over-voltage,temperature protection,humidity protection,12V/ ... protection No pollution, no noise, no radiation 3.17% high conversion rate solar panel makes the solar energy be used ... sensor, light off by time set. No need for manual control after the first set. Solar Street Light with high quality