Supported System Software: n/a
SCSI: HDI-30
Serial Ports: 2
Sound Output: mono 8 bit.
ADB: 1
Ethernet: none
Machine Gestalt ID: n/a

Minutiae:  

Serial Port with the phone icon supports synchronous modems, with handshaking on both output and input supported.

This dock was specifically created to support the Duo 210 and Duo 230. It will, as is, also support the 250 and 280.  With a special replacement lid it will also support the 270c 280c and 2300c.

Has a 1.44 MB SuperDrive.