Keyspan

USB Twin Serial Adapter

Keyspan's popular USB Twin Serial Adapter is recommended by dozens of serial device manufacturers and has been certified by Apple for use with Final Cut Pro.

Plugs into any USB port
Provides two RS-422 mini-DIN8 ports
Supports data rates of up to 1 Mbps
Draws its power from the USB connection - a power adapter is not required
Emulates the printer port one one port