With this corded USB-to-headset adapter and H-Series headset you are able to manage your PC communications with top class call clarity and the simplicity of inline call controls. Plantronics DA45 USB UC Audio Processor will connects directly to the USB port of a PC. It is optimized for Unified Communications. This product has wideband audio support and PerSonoCall® Software. It is equipped with Digital Signal Processing (DSP) Technology. Echo Management is decreasing VoIP call latency. This product has in-line volume and mute controls and Call Answer/End. Quick Disconnect connection to “H” Series Headsets. With Quick Disconnect capability you can detach the headset without losing the call.