I first fitted a TyreDog external system to my 2010 Puma cab chas in 2013 and they saved many tyres as the heavy duty truck has tubed tyres. The display unit gave up the ghost last year and I replaced it last year with the ARB external system. It has a single display which plugs directly into the cig socket but it is a dog to set up. I have also had to have the system replaced as I was not able to change the settings.
And now the problem is evident in the new unit. I swap it between my vehicles and so need to change the settings regularly. Some clever little electonics wizard has been a bit too cute trying to use 2 buttons to manage all the functions. Yes, doable but not ideal.
The local ARB people have not been much help either and it is not a cheap system
Oldie
2010 Defender with Trayon.
2014 RRS HSE (the town car)
2013 RRS crushed
1999 Disco 2 gone
1984 RRC gone
Series 2a gone

