1. With LCD display, and call records is readable; 2. Skype titles such as 揅ontacts?could be operated from the LCD, dialing from the keypad is visible; 3. PC-to-PC and PC-to-phone operation ; 4. Driver built-in, plug and play; 5. USB1.1 compatible; 6. No need sound card; 7. No external power required; 8. Complies with H.323, MGCP, SIP protocol; 9. Echo cancellation, noise reduction; 10. Application support: Skype, and support Skype speed-dialing function; 11. Full duplex communication; 12. Key-in tone function.