1. PC-to-PC and PC-to-phone operation; 2. Free-hand function 3. Driver built-in, plug and play; 4. USB1.0 & 2.0 compatible

1. PC-to-PC and PC-to-phone operation; 2. Free-hand function 3. Driver built-in, plug and play; 4. USB1.0 & 2.0 compatible; 5. No need sound card; 6. No external power required; 7. Complies with H.323, MGCP, SIP protocol; 8. Echo cancellation, noise reduction; 9. Support Skype, UUcall, Alt, QQ, MSN, Talk, Yahoo, Sip Discount, X-Lite, Eyebeam, X-pro, Sipgate, IPhone, Vonage, UBIFONE, Imtel, Voip Buster, Voip discount , Voipcheap, VOIP Stunt, SparVOIP, INTERNETCALLS, NetAppel, YpoivyY, FreeCall, WebCall, VOIP RAIDER, VoipWise Onet2phone; 10. Full duplex communication; 11. Support Skype speed-dialing function; 12. Free-hand function.

low price USB VoIP Phone