CG0011W Compatible with Skype， Ali Call， QQ， UUCall， Yahoo， MSN， Freecall， Siphone， X-Pro， Eybeam software applications With volume control USB 2.0 interface， compatible with USB 1.0 Do not need any sound drive Do not need other power source Compatible with H.323， MGCP， SIP agreement Offers better inputting service and excellent audio input and output   Package Details Weight: 165.85 g Size: 25*15.5*4 cm Package Includes * USB Phone