If the product you look at the page on which this review will appear, then you could tell that the manufacturer has not bothered to create a flawless German description. But at least create the existing photos here some idea of this construction. The manual delivered with the product is in fact dominate only for people of benefits, the English or Chinese reasonably. Although you will also find photos, but in a size that prevent any understanding from the outset.
Thus a light dawns, you have to connect the battery to the lamp. This plug-in is additionally secured by a screw, which prevents cycling in particular a breakage of the coupling. The lamp is mounted in this connection with one of a stable and secure impression transmitting rubber on the handlebars. Little thought, however, then securing the battery. For this there is only a velcro. Since the battery is much heavier than the air, eventually you have to attach differently on the bike, but in turn also so that you can easily abbekommt him again if he needs to the socket for charging him anyway.
A similar problem exists when using a headlamp. The lamp can be here again with one of the two gums attach to the headband. They are excellent light and is very well aligned and down. Because battery can be cumbersome attach with the Velcro strap on the belt. However, what really bothers is the cable from the battery to the lamp that you yourself somehow lead past the head and body and must secure that it is not annoying. At least on the headband, the manufacturer should have come up with such an attachment. On battery we find a loop pass through the only the attached Velcro. If it is larger by two centimeters, it would also be used for standard belt.
The idea behind this product is very interesting indeed. Unfortunately, it has not been thought through to the end, what makes the use unnecessary.