... 1, Supports SIP, H.323, MGCP, IAX2, and net2phone protocol 2, Supports Skype, MSN and QQ software 3, USB2.0 port 4 ... serial write in 6, With HID (Human Interface Device) feature7, Plug and play to install USB driver8, No driver needed for Win98 SE ... for PC to phone connection 14, ALED to indicate power and linking status 15, Adjustable volume for handset 16, Supports E ...