The bracket (handlebar clamp) is in soeinem Set in the price range of most biggest criticism and even here one can be determined divided. Installation on my bike went smoothly and for my purposes the holder appears to be stable enough, but even if the lamp can really Clip the very firm, the whole thing does not make you 100% solid impression. I was able to mount namely relatively easy or forward rear turn what determines sometimes is very useful when you want to regulate the beam range while driving, but now and then inadvertently leads to the little lights to high or too low the lamp , However, the lamp itself sits really bombproof in the bracket, but just sitting the holder not bombproof on my handlebars. But I also have to confess that I did not dare to put the screw even tighter (after fixed is known from) what determines Remedy could have done, if anything because Dan would also be broken. But, after a few blows stronger through eg potholes a strong under tension Plastikverschraubung would with my luck broken, but of course that is pure speculation. It may be that you can "anballern" easily fixed the bracket.
All in all, a strong buy recommendation for the price range. Sorry, no batteries are in the process comes at the price but still ok.