I had one.
I used it once, and never again. You could see mabey 30 Yards out. And the battery life was very short. I'd say spend mor money and get something better.
It was even poor as a flashlight. I traded mine for a couple of AR mags.
Just my thoughts on it, I tried it with the red and the amber filters, it just didn't reach out far enough. I think it's a nice size, but too small to be of any use for the task it's designed for.