Which SatNav for a Lorry?

Whatever you do, make sure it’s LOUD! I have extremely good hearing, my lorry is a Renault master van conversion and really not noisy at all compared with the DAF I had previously, but I cannot hear google maps on my phone over the engine, even turned up all the way. It is fine at less than half volume in the car.
 
Haha catembi one of them does say it’s for even the noisiest of cabs. Can’t remember which one now though! Duh.
 
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