Easy to install USB (Universal Serial Bus) Plug & Play technology Simply managed conference calling PC sound card not required Superior sound quality Artificial side tone for real phone sound Acoustically isolated speaker & microphone to eliminate echo Independent use of phone & sound card allows for Vo IP call while listening to music on PCProvides for an additional sound channel LED indicates USB (Universal Serial Bus) connection state plus off-hook condition Hook switch allows for intuitive start & end of Vo IP calls Out of the box use as speaker microphone for any soft phone Designed in the same way as the Cyberphone the Cyberphone Speakerphone is a USB (Universal Serial Bus) plug & play device that is as easy to use as any regular Speakerphone telephone. Simply plug the Cyberphone Speakerphone into the USB (Universal Serial Bus) port of the PC download Internet telephony software & start making conference calls. Download Internet telephony software from your favourite service provider to start making calls. Some examples of service providers are Callserve GO2CALL SJ Labs SKYPE