The lamp operates with the three supplied AAA batteries, which are used in the screwed bottom. Personally I use the quality Eneloop batteries. Inside a bright LED is housed that you turn a switch on the side of the lamp. Pressing the button longer, you can dimming down the light intensity continuously. Conversely, that works too. If the lamp is switched off and on again, it will light up initially always at full strength.
The lamp gives off a pleasant light, the luminosity is by design but rather limited here. Very handy, I find that you both just stand the lamp, or up by means of the two attached to the bottom bracket or can mount. The build quality of the whole construction makes a very good impression. The outside is made of durable Kunsstoff and splashproof. Its light weight, inclusive batteries the lamp weighs only 125g, and the compact design, the lamp is ideal for camping and hiking. Overall, this is a very successful small lamp, which is to me worth 5 stars.