The PL-4 wall plate has 2 programmable switches, 4 programmable tri-colour LEDs and a rotary control with LED ladder. It has a built-in infra-red receiver, allowing it to be operated at a distance using the PL-5 handheld remote controller – these control options can be different to those set on the PL-4. PL-4 is ideal for local operator control of iDR-based audio systems. They may be used, for example, for source selection for an output zone, or for local volume control