thats the same handset that i use on my map, just with a different front cover and different tuner using them. Tuners use as they are cheap and easy to use for transfering maps. the good thing is they also read fault codes, they are very much like the bluefin handsets in the way they work
it holds 3 maps. usually your standard map, the remapped version, and an immobiliser map. Mine is slightly different, i have my standard map, stage 2 map and stage 3 map so i have more switchability, which is handy in this weather.