1. Free from PC: With LCD dot matrix display, all the Skype titles such as Contacts, Dial, Call list could be read on it and could be operated using the keypad; 2. Support 10 types of languages displaying, such as Chinese, Simplified Chinese, English, German, France, Japanese, Korean language and so on. 3. With back light, much clearer; 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. USB2.0 compatible; 8. No sound card needed; 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