RDL D-RC4ST 4 Channel Remote Control Wall Plate for ST-SX4The D RC4ST is a wall box mounted remote module designed to directly control an RDL ST SX4 Audio Switcher Module. The ST SX4 provides solid state switching of one of four unbalanced audio inputs to a single unbalanced audio output. The D RC4ST connects directly to the POWER and CTRL terminals of the ST SX4 using either a 3 conductor cable or a single shielded pair. The front panel of the D RC4ST features four pushbuttons with four associated LEDs.