Free from PC: With LCD dot matrix display. Can display Skype titles, contacts, dial and call list and could be operated using the keypad France, Japanese, Korean etc. With blue backlight With ring tones and adjustable volume PC-to-PC and PC-to-Phone operation Plug-and-Play Fully compatible with USB1. 1 and USB2. 0 Sound card not required External power not required Support Echo cancellation, noise reduction Support Skype, and Skype speed-dialing function Full duplex communication USB Audio Device class specification 1. 0 compatible Support Windows 98SE/Windows ME, 2000, XP