1, Compliant with USB 2.0 full speed operation
2, Compliant with USB audio device class specification v1.0
3, Supporting Skype, MSN Messenger, SJ Phone, Net2phone, X-lite
4, 16-bit high quality voice tone
5, Free PC to PC calls
6, PC-to-PC and PC-to-Phone operation
7, Support Plug and play
8, No driver and sound card required
9, No external power required
10, Echo cancellation, noise reduction, and full duplex communication
11, Phone rings for all incoming calls
12, 199 incoming calls and 199 dialed numbers.1, Bluetooth protocol: version 1.2