This controller will run four (4) HID lights at 240 Volts-Maximum 4000 Watts. Features heavy duty industrial grade relay. 120 Volt accessory timed outlet to activate in-line fans to cool your lamps. Plug relay trigger cord set your lamps. Plug relay trigger cord set into 24 hour wall timer. On/Off swithc that makes lamp replacement easy. 3 screws in back panel makes timer easy to wire into your power system. 20 Amps/240 Volts/60 Hz./4000 watts. 3 year warranty.