This PSU supports the USA Turbo Duo and the PC-Engine Duo BLACK/Orginal.
" NOT for the  WHITE PCE-Duo-R/RX. Please see DUO-R/RX listing.
 
This power supply supports the USA Turbo Duo and JAPAN Original BLACK-DUO.
USA: TURBO DUO
JPN: PCEngine DUO BLACK version. If you have a WHITE DUO this is NOT the correct powers supply.

TURBO DUO Power Supply
High Quality TURBO_DUO Proprietary Connector.

For your Turbo Duo or Black PCE Duo.
Special 6 ft heavy duty  cable
Special strain relief just for this unit.
Proper connector the USA TURBO-DUO and the Japanese PCE-BLACK-DUO. (both USA  & JPN versions)

NOT for the WHITE Duo-R or Duo-RX

If you have a DUO-R/RX, check this site for the DUO-R/RX PSU in a different listing.

* Supports Mods.