USB VOIP Adaptor AD200 provides the high quality of VOIP communication by easy Connection to the Internet. It can be connected to the regular phone and enableThe user to place a Skype phone call exactly the same as if you are placing A regular call.1) Make and answer both Skype calls and PSTN calls simultaneously, USB interface to PC,1 FXS for regular phone,1 FXO for PSTN call.2) Pc-to-PC, PC-to-phone, Phone to phone operation3) Three-way conference calling between PSTN and Skype calls4) Auto-detection and auto-switch to Skype or PSTN calls5) Driver and sound card built-in, no external power required6) Call forwarding to programmed numberCall forwarding password configuration7) Echo cancellation, noise reduction, full duplex communication8) Easy program installation and non-driver installation9) High quality and stability, cost-effective10) Dial using the phone keypads11) PSTN or Skype calls selectable by phone key (##)12) Phone rings for all incoming Skype and PSTN calls13) Call waiting14) Record telephone communication to PC.15) Supporting DECT,2.4G,900M and any other wireless phones16) USB and PSTN lines LED indicator