It has to be the Volvo "Dice" interface, which connects via USB (genuine ones can use Bluetooth, but it's Slooooowwww!)
You can get Chinese "clones" for around £80 on Ebay, I have one and it works fine, you can do EVERYTHING the Dealer can, apart from upload new software to the car, as this requires a subscrition with Volvo.
Mike
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