rev counters

hi there lads im new so tell me if i have put this post in the wrong bit of the forum
the daytona rev counter for sale on this website, the £95 one there is a picture one of 3 that show the rev counter and a set of different brackets. would i get everything shown in this picture or just one, im unsure
also the £46 koso rev counter, what does this show, e.g. temp, speed, revs? and is the speed km or mph
and does this come witha bracket
cheers rich