less than optimal

from me, there are only 3 stars because: Installation is feasible without tools, including the dismantling. The front lamp switches off after pressing the on / off switch, however, the rear after seven times, press. The rear lamp just works as it should, with various modes. The front lamp is the luminous intensity of her hammer, the beam can steplessly and easy to adjust, only drawback, which is why only three stars, which is a power-hungry lamp. I ride every day about 5 minutes from work to home, in the dark, so light. Thus, I need every two weeks a set of batteries for the front lamp, and that's my opinion, for an LED lamp way too much.