I have a really good one. I think it is a Ring 900. [Later] Found it!
Ring RAC900 Heavy Duty Tyre Inflator, Air Compressor with 7m extendable airline, brass connector and storage bag: Amazon.co.uk: Car & Motorbike
I've had it many years and it has been excellent. Faster than a forecourt airline. It uses a fair bit of power. After a few years it melted its 30A
fuse holder, so I replaced that
The only unsatisfactory bit of it is the valve connector. I replaced that with the standard sort used by the trade.
PCL Airline Tyre Inflator Twin Open End
The coiled air hose reaches all the motorhome wheels and it is effective and reliable
It does get quite hot in use, of course. Just give it a few minutes to cool down before touching it.