Description:  Notice: Available color:white red black please choose the color you like and write it in the comments when you place the order. Description:  USB port hot insert no driver  no need sound card and power support clear tone  no need to take headphone and mic for long time.  decrease the noise and maintain the phone quality  support PC-to-PC and PC-to-phone  USB port 2.0/1.1  no need sound card  no need external power  low down the noise  compatible with H.323 MGCP SIP  full-duplex communication  button sound and in call sound  support Skype platform and quick dial  read and operate Skype friends dial call record use phonebook to dial  LCD glass screen   System required Microsoft Windows 2000/XP 128MB  16MB hard disk a USB port. network connection ( ADSL Cable Modem wireless LAN )