... 1) Perfectly support Skype, VoipButser, VoipStunt, VoIPCheap, VoipDiscount, SparVoip, Internetcalls, poivY, WebCallDirect, VoipCheapCom, FreeCall and NetAppel and other software; 2) ... calling at will; hands-free and key tone dialing function available; 5)Smooth mouse run with VOIP Phone simultaneously, the ... ¶ DC Input: 4.0 ~ 5.25V;¶ 1.5m USB cable, with transmission rate of USB1.1 (12Mbps); ¶¶ 2 ...