The RC4-ST from RDL is a wall-box mounted, four-channel remote control module designed to control an RDL ST-SX4 audio switcher module, which provides solid state switching of one of four unbalanced audio inputs to a single unbalanced audio output. The RC4-ST connects to the power and control terminals of the switcher via a 3-conductor cable or a single shielded pair. The remote features four push-buttons and corresponding LEDs for a wonderfully simple, straightforward interface. For stereo installation, the slave output from the ST-SX4 is used to drive the control input of an additional ST-SX4