*Easy install. No need drill hole. Just stick the light lamp on the door panel and stick the magnet on the bottom of the car frame. No harm to car.It can be installed in both left & right door. Courtesy door light make your car artistic moreover the atmosphere *Series 1PCS, 100% Brand New Door Laser wireless sensor Light Lamps, Free replacement for the logo film slide, Powered by 3 Pcs AA batteries