This controller will run four HID lights at 120 Volts - Maximum 4000 Watts. Features High quality Siemens brand relay. 120 Volt accessory timed outlet to activate in-line fans to cool your lamps. Plug relay trigger cord set into 24 hour wall timer. Universal outlets allow total flexibility. 3 screws in back panel makes timer easy to wire into your power system. On/Off switch that makes lamp replacement easy. Durable powder coated steel chassis. 30Amps/240 Volts/60 Hz/4000 Watts. 3 year warranty.