Japanese VMUs restored to working order. Can be requested with or without a working beeper (only used to alert when battery has run dry, results in high-pitch beep when plugged into controller when coin cell battery dies). Extra space can be freed up on the VMU on request, but it might result in compatibility issues with some games.
Even though language is in Japanese, these are completely region free and work with Dreamcast games & systems of any region. Battery dying does not result in save files being lost on these units.