Detailed Product Description

Main Features:

Supporting SIP, H.323, MGCP, IAX2, net2phone etc lot of protocol 
Supporting Skype, MSN, QQ etc many software 
USB 2.0 port 
16 bit sound card inside, the PC can without Sound Card
Support product serial write in 
With HID (Human Interface Device) Feature
Plug & Play to Install USB Driver
No driver needed for Win98 SE/Win ME/ Win 2000/Win XP
With PID (Physical Interface Device) Feature
Implement "Real-Time" verification
Compatible with Major PC's Internet Phone Application Software
Provides Ringer Generation for PC to PC Call Through Existing IP phone Applications
Optional ITSP Application Software With Credit for PC to Phone Connection
ALED to indicate Power and Linking Status
Adjustable volume for handset
Support E.164 dialing rule
Record support
LED indication
The powered via the USB port with not need for a power adapter. ... 
FCC and CE approval!