The RMS 4000 Remote Mute Switch from AKG connects to a beltpack transmitter for easy and discreet muting, even if the transmitter is mounted at an inaccessible location. The switch has locking on/off switch, a 43″ cable and a 2.5mm plug for compatibility with the DPT 700, PT 400, PT 4000, PT 450, PT 4500, and PT 470 beltpack transmitters. A clip allows you to attach the switch to your clothing.