Support Instant Message(IM)software such as skype regular PSTN call Hold and switch IMcall and PSTN line Support PC to PC,PC to phone,phone to PC,phone to phone,including mobile phone Adapter function,suppout PSTN regular phone as IM phone Gateway function,support twice dialing and forwarding in hardware USB2.0 plug and play without external power Echo cancellation,noise reduction and portable Support skype shortcut dialing numbers and skype out dialing numbers Support kinds of standard analog phone and analog PBX system Provide Voice Mail Box function for PSTN call Phone book management runction Support multi-language version adn friendly GUI on driver Support Windows2000,xp and above