... compatible with USB1.1and USB2.0 USB skype phone,USB voip phone, skype USB phone1.Free from PC:with LCD dot ... compatible with USB1.1and USB2.08.Support skype and software telephones such as voipbuster , voipstunt, voipcheap, sparvoip, voipdiscount, internetcalls ... Skype, and Skype speed-dialing function13.Two-way communication14.USB Audio Device class specification 1.0 compatible15.Support Windows ...