I had read reviews before buying, and was prepared for anything !!! For no reason !!! I tried the shower and after I had taken out the filter at the pump and have pressed the Silbermetallstiftchen right on the shower handle and had made the cigarette lighter of living Mobis, the power supply and had the pump in the bucket of water came a really good beam out of the shower! !! Could not be better !!!! Oh I also have 4 batteries (1.5V) done in the battery compartment! I am highly satisfied !!!!!!!!!!!!!!!!!!!! Can recommend the product only !!!