Nokotech Master Controller {PWM} is a light controller and a substitute for switch-boards that have many more functions. This controller is specifically designed for controlling NOKATECH DIGITAL Pro 600 ballasts. This controller is a PWM (pulse-wide modulation) type. Benefits: Setup of autopilot (on/off timing) In the case of extreme heat, the emergency shutoff protects plants. Adjusting the power level (dimming options) Monitoring of temperature and humidity Two separate grow areas (with up to 80 fixtures) can be controlled. Note: The grow lights master controller can only be used indoors. This controller does not connect or control humidifiers. Features: There is no need to have a switchboard Installation is simple and secure Protection against short circuit Up to 160 fixtures can be controlled Temperature setting triggers auto shutdown Displays output in W or % Two separate grow rooms can be controlled 3-year warranty Includes all of the following: Grow lights Master Controller 1 piece USB-DC power cord 1 piece DC power adaptor (5V; 2000mA) 1 piece RJ cable Two pieces of Temperature/humidity sensors, each measuring 5m/16ft in length Two pieces of countersunk screws and plugs to mount 2 pairs Mounting plate 1 piece