Compatibility question

[AeroplanikO]

Hi all. I am not sure if this is the right place to ask, but I have been looking to change the radio player of our opel vectra 1990 ( radio model is sc303b ) with an mp3 player that has a usb input as well. So far I have decided for this, ebay.de/itm/DIGITAL-AUTORADIO-DIN-AUTO-RADIO-USB-SD-MP3-PLAYER-ID3-RDS-PLL-TUNER-AUX-INPUT-/260906105094?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D3966798175742846170%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D260906105094%26

So, is it gonna fit in our vectra or should I look for another player? Would you recommend another one, for under 50 euros ? Thanks a lot in advance.

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