Compatibility: Works with all Plantronics QD headsets (not for Jabra). Quick-disconnect for headsets, USB-A for laptops/desktops. Convenient Inline Controls:: Volume up and down, Mute Microphone,Mute Speaker. Ideal Cable Length：1.7m (67-inch) cable offers flexible movement and comfortable use in any workspace. QD to USB Connection: One end is quick disconnect for the Plantronic-headsets, another end is USB plug for laptop, desktop. User-Friendly Design：Streamlined, reliable construction for seamless office, call center, and remote work use. QD to USB Adapter Cable Compatible with Any Plantronic-Poly QD Headset with a Quick Disconnect with Volume Control and Mute