Automatically turns lights on and off. Works with all bulb types. Optional vacancy mode (manual on). For use with 250W (watt) incandescent, ELV (extra low voltage), or halogen. Also compatible with 200W MLV (magnetic low voltage), 150W CFL (compact fluoroscent), LED (light emitting diode), or 2A (amp) ballasts. 900 sq ft coverage, 180 degrees field of view. Single pole.