For what it is, this remote device seems phenomenally overpriced, but if you need one then you need one. My charger is buried out of sight meaning that if I want to keep an eye on it I need the remote.

It seems to work fine. It connects via a slightly odd cable (RJ11 plug at one end; RJ45 at the other) but from looking at its connections it seems that a standard RJ11 cable would work - I haven't tried it.

The documentation is abysmal - just one page in the main manual, which misses out most of the crucial information. It's written in the same "instant brain-dump" style and you're left to fill in all the missing detail for yourself. The documentation in the manual doesn't quite agree with what's written on the front plate of the unit, and neither quite agrees with reality. Some experimentation is needed.

By default, it seems to cycle around displaying various different values (this is one of the obvious bits of information missing from the manual) and you're left to work out for yourself what they mean. After much research, there's only one left for which I so far can't find any clue.

Summary - it works, but it lacks polish and the documentation is pretty much non-existent.

Worth purchasing with a b.b charging unit as I did very pleased with my system

Easy to fit and allows you to monitor what's going on charge wise on the main unit.
Instructions are a little confusing as neither the remote or main unit seem to work as per instructions.
Vehicle electrics are always tempremental​ tho !