3V AC Power Adapter for Sony MD MZ-R55 R70 R91 R500 R700 R900 R909 N1 N700 N710 N910 NH900 

Universal
Sony's MD is basically compatible.
CD for NE820 NE830 NE720 NE730 NE10 EJ2000, etc.

Panasonic AIWA is also compatible.

Sincerely