Features: Supports Win 98/2000/XP/2003 Use Usb interface 1/2 telephone port Mouse can capture a telephone number in the screen and dial automatically. Leave messages and atuo answer 5 rate compress, 1 GB HDD space can redord 170 hours Support DTMF/FSK incoming caller ID Record start control with Voltage, voice active or telephone key Lookup Recording thru Server, LAN or internet Export wav file or MP3 file