It looks like any other hair trimmer, with the cutting teeth at the front, one set running over another set, which the hair on your head, (or where ever you're trimming), gets in between to the crossing of the teeth and trims it off.
The on/off switch is on the right side toward the rear end, with the cable coming right out of the rear. This is ideal as the cable does not get tangle up as you go about using the trimmer on your head.
Just behind the teeth head there is a little lever, this is to give a fraction of a mm to the cutting edges, moving the lever up and down in order to give a finer cut.
It is only about 60mm wide making it easy to grip and manoeuvre around your head. The length of it is about 170mm long so your hand is not in the way of the trimming area.
You not only get the hair trimmer, you also get 8 cutting combs, a normal comb, a pair of scissors and a nose hair trimmer. Plus a lovely case to keep it all in.
These cutting combs are there to give you a choice of hair lengths, from totally shaved, with no comb attached, to 25mm, with the largest comb fitted. I tend to stick with the 12mm and the 9mm, using the 12mm first if I've let my hair grow for too long. But I stick with the 9mm as I find that the right length.
These cutting combs simple slide on to the front of the teeth, locking the little catch on the back of the cutting head.
The teeth don't seem sharp but the way that the top layer slide over the bottom layer you'd think that they were razor sharp, the way that it trims section of my hair with just an easy push across my scalp.
It is pretty quiet, compared to some i've used, although when it touches the skull bone it does seem louder than it actually is.
I do advise spraying some sort of lubricant over the teeth and where the cutting head joins the main handle section. This helps keep the cutting head nice and smooth running, ready for the next cut. (I use WD40, spray a bit over the head and away I go)
The price of these hair trimmers is about £20 - £25 from any good sellers.
I've not used the nose trimmer but it's there if you need it.