1. With LCD display, and call records is readable; 2. Skype titles such as 揅ontacts?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