Detailed Product Description1. PC to PC and PC to phone operation
2. Driver Built-in, plug and play
3.
USB 1.1 compatible, no need sound card
4. No external power required
5. Complied with H323, mgcp, sip protocol
6. Echo cancellation, noise reduction
7. Full duplex communication
8. Application support: Netmeeting/Messenger, Mediaring, Net 2 phone, Dialpad
9. Compatible with skype, the free pc internet phone service
10. Free phone call among pc users