When I held the first time in his hand the lamp, I thought at first that it has no zoom or adjustable focus. I could see at first glance, nothing where you could adjust something.
With try something and turn, I then found out that run through the upper head and push changes the focus. This head was however at me so hard that I thought the beginning, the head can not be changed. Slightly grease has helped here and now it's like butter! Here lies not provide guidance or at least a small note to so that I may depart this one point.
The lamp can be operated with 3 AAA batteries or with a 18650 battery. I operate the lamp with the AAA batteries and am positively surprised about the light output. The small lamp exerts great light. The adjustable focus, can illuminate selectively or in space.
In the minimal zoom setting, however, the square shape of the LED is projected as a light on the wall. This looks a bit strange.
You zoom out a little more, slowly creating a circle of light. In this setting, I use the lamp and so have a good compromise of illumination and brightness.
The green switch on the back of the lamp is easy to reach, even with slightly thicker gloves. What I like here, the individual functions of the lamp can be changed via a slight pressure on the button.
These are:
1 - 100% luminosity
2. - 50% brightness
3. - 25% luminosity
4. - Strobo Light
5. - SOS light
I have the lamp very satisfied not long in operation, but am so far.
When adjust defects, I will report my update.