Hi Paul,
I have one in my C70 which works very well - I’m happy with it. In fact, I’m planning on adding it to my 850R as well once it’s ready for club permit registration next year.
I actually purchased it from eBay & there were 2 versions from memory - mine was the older one. It was around $150 I think... excellent value & easy to install with the way my head unit comes out simply:
https://www.ebay.com.au/itm/Yatour-USB-SD-iPhone-iPod-iPad-AUX-Adapter-Bluetooth-Volvo-HU-Radios/282657315187?hash=item41cfb05973:g:OB0AAOSwUxheqbao
Good luck!
George