This is an auction for a SONY cassette Walkman remote control, RM-WM79E. The remote control's operation is untested, so it is being sold as junk. [Operation Check] ・Remote Control Operation: Not confirmed as I do not own a compatible model. ・Sound Output Check: Confirmed by connecting to a CD Walkman, D-NE730, and stereo earphones, MDR-E741 (micro plug) ⇒ Normal, including volume (see photo 7). [Connection Size (Actual Measurement)] Plug Diameter: 3.5mm Plug Length: 14.0mm * Compatible stereo earphones are micro plug TYPE such as MDR-E741. [Compatible Models] WM-EX2 etc. [Special Notes] ・"Junk" products mean that basic operation is not guaranteed. Please consider purchasing with this understanding. ・Please research compatible models other than those listed in the "Compatible Models" section.