Switch or better "key"?

Want you in front of a possibly bad buy preserve, as unfortunately happened to me: I had expected to get a "real" switch, but I got a button. The fact is only light, as long as it is held down. Suffice it a very gentle pressure on the sensor surface, but once you let go, the lamp is off.

At first I thought that this is a product shortage, but the dealer has assured on demand, which was okay. Right.

Although found on the side of the screw cap at the other end of the cable, a pressure switch with the normal switching functions, but this one has also the built-in switch of the lamp.

For my bike meant as additional lighting for critical dark forest paths and curves, this button brings me almost no profit, because to switch to "continuous light" or switching modes I must nevertheless take your hands off the handlebars. I have the thing returned, unfortunately.

Difficult to make a fair assessment. For the defective product description more than 3 stars.