Voip Monochrome 128*64 pixel dot-matrix graphic lcd , supports all kinds of languages Skype contact list, call list and time display on lcd screen 8 classical 4-polyphonic ring tones catering to different tastes. Rings loudly on an incoming call. Fully functional keypad and lcd display of skype contacts enables you to make/receive calls without using mouse and keyboard. Acoustically isolated earpiece and microphone to eliminate echo. Full-duplex communication with crystal clear sound. Usb interface pnp. No external power/sound card needed. Handy, chic, and portable for notebook pc. Also compatible with other pc-based softphone applications, such as msn, yahoo message, qq, xten, dialpad, mediaring, net2phone, etc. Dimensions: 105mm*40mm*18mm Weight: 90g