Features: 1) Supports Skype, X-Lite, Dialpad software phone and SIP, H.323, MGCP protocol 2) Fully functional keypad enables you to make/receive calls even easier 3) Rings loudly on an incoming Skype call 4) Acoustically isolated speaker and microphone to eliminate echo full-duplex communication with crystal clear speech 5) USB interface PnP, no need driver, no external power/sound card required 6) LCD display and LED indicator 7) Streamlined and fashionable design similar to a mobile phone 8) Colors available (gray, silver and red) 9) 199 incoming call and 199 dialed numbers 10) Free SkypeMate software is included in the installation CD or download from website that enables the USB device to work with Skype seamlessly 11) On SkypeMate have 10 kinds of rings and volume adjustable, 20 kinds of language version 12) Also compatible with other PC-based softphone applications, such as X-Lite and X-Pro or eyeBeam, MSN Voxbar, Dialpad, Net2phone, VoipBuster, Nortel, SJphone and Google talk