1.With LCD display, and call records is readable; 2.Skype titles such as Contacts could be read from the LCD, dialing from the keypad is visible; 3.With back light, more clear; 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; 13.Full duplex communication; 14.Key-in tone function.