The New Karry USB Phone V2 is a phone with USB interface. It is plug and play. No drivers needed. It is streamline and fashionable like a mobile phone. It works with a proprietory SIP softphone that can be dowloaded from Euphonex.com for free. It is easy to operate and easy to configure. This phone can be used for Home and Office / SOHO users. Price includes $9.95 worth of of free PC to Phone call (Premium Membership). Click here for our International rates. Benefits - High Mobility, provided real-time volume adjustable button, can be mounted on your monitor or wall, free and paid PC-to-PC or PC-to-PSTN calls over the Internet .