This unit comes with a 4-pin male XLR connector. Note that one ear muff is missing and the cover of the other is peeling off.

Using this intercom headset is simple. Just connect it to your device via the 4 - pin male XLR connector. When using, make sure the connection is secure to avoid signal loss. Since one ear muff is missing and the other's cover is peeling off, be careful when handling the headset to prevent further damage. To maintain it, keep it in a dry and clean place. Avoid getting it wet or exposing it to extreme temperatures. Check the connection regularly to ensure it works properly.