The Apple PowerBook Duo 230 features a 33 MHz 68030 processor, 4 MB of RAM and an 80 MB or 120 MB hard drive in a compact, lightweight portable case with a 9.1″ grayscale passive-matrix “Supertwist” display.
The PowerBook Duo series provides both a portable computer and the and the option to set up a full-powered desktop Macintosh by plugging the notebook into a compatible Duo Dock.
Video:
Here’s the actual item in my museum
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The Duo 230 basics:
Color: Grey | Graphics: 1 Bit (B/W) | OS: System 7 | Ram: 4 MB | Series: PowerBook