1. With LCD display, and call records is readable.
2. Skype titles such as Contacts  could be read from the LCD, dialing from the keypad is visible .
3. With back light, more clear .
4. With ringer, rings selectable and volume adjustable .
5. PC-to-PC and PC-to-phone operation .
6. Driver built-in, plug and play .
7. USB1.1 compatible .
8. No need sound card .
9. No external power required .
10. Complies with H.323, MGCP, SIP protocol .
11. Echo cancellation, noise reduction .
12. Application support: Skype, and support Skype speed-dialing function .
13. Full duplex communication .
14. Key-in tone function.
15. Compliant to USB V 1.1 Version .
16. Compliant to USB Audio Device Class Spec V 1.0 version .
17. Compliant to USB HID Version 1.1 version .

18. A type USB connector .
19. Dimention  135mm*50mm*28mm .
20. Weight  110g