Texas Instruments TravelMate 4000M User Reference Manual page 203

Features
The Portable CD-ROM Docking System may be attached to
the TM4000M to provide multi-media capabilities for your
notebook.
Features
The Portable CD-ROM Docking System has the following
standard features:
12-2 Portable CD-ROM Docking System
Portable CD-ROM Docking System
Portable CD-ROM Docking System - supports both
information and music CDs
AC Adapter - provided with power cord
Battery power - NiMH battery provides clean and
efficient battery power. Battery charger is built in
50-Pin Centronix connector - can connect to up to six
external SCSI devices
Microphone/headphone kit - comes complete with
microphone, headset, and instructions
Fea tures