I purchased a new one on the Rakuten market (akibainpulse) in March this year, but the DSP amplifier is no longer needed (it has not been installed in the car), so I am selling it.
It comes with a warranty card from an authorised distributor in Japan (M's LINE).
*Operation checks have been carried out at home using a DC 5 V power supply and DAP, so it is not unopened.