1.compatible with voip (voice over internet protocol) solution such as skype 2.works as microphone & earphone with yahoo messenger,msn messenger, 3.ms netmeeting and etc 4.hot-key functions to operate skype software as easy as dialing a normal telephone 5.echo-cancellation for better sound quality 6.8 types of ring tones for incoming call alert 7.use dot matrix lcd module 8.supports multi-language(english,japanese,germany,traditional/simplified chinese) 9.lcd backlight turns on while receiving a call or any key is pressed 10.as a speaker to broadcast music from pc 11.lcd to display caller id, contact list and calling list(miss ,income,outgoing) 12.compliant with usb 1.1 specification 13.no additional power adapter required 14.display skype out balance danny@vnetphone.com