... , Yahoo. 10 types of languages 1. Free from PC:With LCD dot matrix display,all the Skype titles such as Contacts,Dial,Call ... , Korean lan guage and so on. 3. With back light, more clear; 4. With ringer,rings selectable and volume adjustable5. PC-to ... need sound card; 9. No external power required 10. Complies with H.323, MGCP, SIP protocol