The Autopilot APCL4DX high power HID controller with relay trigger cord is specifically designed for operation of high intensity discharge (HID) lighting systems. It can control up to 4000 watts of lighting from a standard 24-hour timer (sold separately). The four NEMA 6-15R or universal outlets allow for running your ballasts at 120 or 240 volts without having to change out your ballast power cords. A high power relay allows the power to cycle on and off, while the timer and/or trigger cord activate the relay. Providing safety and protection from overloads, this controller also has a built-in circuit breaker. It's built with only the highest quality components and will provide the user with years of trouble free service.