Usb-m05 is a professional usbphone that enables you to enjoy the full feature of skype. Like a mobile phone style, with dot-matrix graphic LCD and back light, any language character can be displayed. Plug into your computer\'\'s USB port, you can review the skype contacts and make/receive skype calls on phone. Phone rings for all incoming calls, dial skype contacts and skypeout numbers from the phone. With keypad, ringer and headset jack, easy to use Packing info: Package: Color box ; 1set/box; 50sets/carton Dimension(box):220*114*53mm Dimension(carton):790*238*334mm Weight: G. W.:10.5kg/carton ; n. W.:9.5kg/carton Warranty: For any quality problem itself, we will guarantee to keep in good repair for one year Features Monochrome 128*64 pixel dot-matrix graphic LCD, supports all kinds of languages 12 classical 4-polyphonic ring tones catering to different tastes Skype contact list, contact person info, call list, skype titles and time on LCD screen Rings loudly on an incoming call, large LCD with white backlight Support skype, and skypespeed-dialing funtion, support sip, h323, mgcp protocol With ring tones and adjustable volume for earpiece and ringer Micmute button for privacy protection Plug-and-play, fully compatible with usb1.1 and usb2.0 Full-duplex communication, support echo cancellation, noisse reduction USB interface pnp. No external power/sound card needed