Bought it as a DIY kit and it was nice little tinkering to build. Some soldering and sealing everything to be watertight etc.
First impression is that it seems to be a massive improvement compared to my old cheap BT remote. This works very well with #osmand but not so well with #locusmaps. Basic zoom in/out works with #karttaselain.
I use #Samsung #activetab3 as a navigation device and it is mounted with #rammounts holder