The TDA5051A Master/Slave lighting demo consists of a master and slave unit housed in plastic enclosures. Each one has an AC power cord which plugs into the AC power receptacles. The Slave unit drives a 4x white HB_LED array which are controlled from the Master unit. The Master unit has four push-buttons to turn the LED array On/Off, to Dim Up or to Dim Down the LEDs and to Select all four LEDs or the individual LED to be controlled.