Just got this yesterday and haven't had much time to play with it. I got it to help me with outdoor projects. I'm sure it's very bright inside. In my outdoor test run, everything worked. It's very easy to turn on mode (slide the bottom lock switch) and switch modes (press the power button on top): vertical, horizontal, or both. It wasn't very bright outside and I could easily see a green line from 20 to 30 feet away. The wider it gets, the brighter and wider it becomes. I don't know anything over 150ft as they advertise. Possibly in very dark conditions. I checked the level again with my regular level and it looks correct. This is my first laser and I am happy so far. I can't wait to use it more. Good value if it lasts a while.
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