Detailed Product Description 1) Perfectly support Skype, VoipButser, VoipStunt, VoIPCheap, VoipDiscount, SparVoip, Internetcalls, poivY, WebCallDirect, VoipCheapCom, FreeCall ... ; hands-free and key tone dialing function available; 5)Smooth mouse run with VOIP Phone simultaneously, the computer operation would not ...