The EPOS USB-ED 01 is a specialized adapter cable designed to connect wired headsets to a PC, specifically for managing softphone calls. It features a USB Type-A connector on one end and an Easy Disconnect (ED) interface on the other, making it compatible with the SC 200 and SC 600 series headsets. Inside the black housing, an integrated mono sound card handles the audio processing, while a small blue LED indicator lets you know at a glance when the device is ready for use. This setup allows professionals to quickly switch their headset between different connection points without needing to unplug the entire device from the computer.