For sale is a Newer Technology Color MicroDock for the Apple Macintosh PowerBook Duo series, part number 7MD-C.
This compact Duo expansion adapter provides video, ADB, and audio connectivity in a very small form factor. Included here are the MicroDock unit itself and the CompuBro DA-15 video adapter shown in the photos.

• Compatible with PowerBook Duo computers
  
• ADB port for keyboard, mouse, and other ADB devices
  
• Audio output
  
• Color video output
  
• Up to 8-bit color (256 colors) on monitors up to 16 inches
  
• Up to 4-bit color (16 colors) on 19 and 20 inch monitors
  
• No external power required

Clean overall vintage condition with normal age and storage wear
This is a nice accessory for PowerBook Duo users, especially if you want a compact way to add external display, ADB, and audio connectivity without a full size dock.Fast and careful shipping from Tokyo, Japan.Please be aware of any customs import duties or taxes in your country.
🇺🇸 US buyers: shipments are sent DDP (Delivered Duty Paid), which means there are no duty fees on delivery, as duties are included in the shipping rate.
Please also note that customs delays may occur, particularly within the EU.
This is vintage hardware/software for vintage computers. Use of this item requires era-appropriate knowledge and compatible hardware/software. Please carefully verify your intended use and compatibility before purchasing. I am happy to answer reasonable questions, but compatibility with every system or configuration cannot be guaranteed, and step-by-step installation support is not provided. Issues arising from incorrect installation, modification, or incompatible use are outside the seller’s responsibility.
I usually ship within 24 hours. If shipping falls on a Saturday in Japan, dispatch may occur the following Monday.