The top safety beam laser sensor is workable with Olideauto automatic swing doors, it will detect the obstacles on the closing door way and make the door reverse. Easy installation. Provide with bracket for installation. Working voltage: AC/DC(12V-30V). Scanning range setting: mechanical adjusting wheel 500 to 2800mm Detect area diameter:about 75mm light spot Current consumption: less than100mA Beam type: infrare Function display: LED Dimension: 12.6(L)*1.22(W)*0.79(H)inch