For years, I cut myself hair, my old hair trimmer had passed away and there should be a new hair trimmer ago. Important to me was a large margin of cutting lengths as I cut my hair different lengths because of Philips QC5770 / 80 hair trimmer fits with its 42mm to very good. Super practical is also the display of the cutting length in mm in nice light blue on a screen and adjustable in millimeter steps by rotating wheel length. This is very safe and you can again cut the same hair length every time. The Philips QC5770 / 80 hair trimmer is comfortable to hold, the essays are easy to change for 4 haircuts I have the battery charged so far 2 times. The battery can be recharged quickly, so the stands of hair trimmer sachnell available. Good is also de charge indicator so you always know how long you can still shave roughly. Can accommodate pleasan all in the supplied case. The personally but rather unnecessary for me as I keep the razor in the bathroom drawer