Detailed Product Description 1) Perfectly support Skype, VoipButser, VoipStunt, VoIPCheap, VoipDiscount, SparVoip, Internetcalls, poivY, WebCallDirect ... key tone dialing function available; 5)Smooth mouse run with VOIP Phone simultaneously, the computer operation would not be ... affected while in answering the phone;2. Product Parameters: ¶ Using 1000CPI resolution optical ...