PC-to-PC and PC-to-phone operation
Driver built-in, no need addtional driver
USB1. 1 compatible, no need sound card
No external power required
Complies with H. 323, MGCP, SIP protocol
Caller ID function of VoIP calls
199 incoming call and 199 dialed number
With LCD show
Direct-call button to the partner shop available
Echo cancellation, noise reduction
Full duplex communication
KeyPad: Redial, In, Out, Up, Down, Del, Flash