I used it for patrolling and very disappointed in quality. I wanted to send it back so bad but the shipping cost stopped me. The product detail said "visible ups to 1 mile" , that's not true at all.You can't focus on anything with this flashlight and the visibility is only about 15 feet away,that's all (with the new batteries). It's very hard to turn on because you have to twist the bottom part until you get the right click and it will turn on. Most of the time, I twisted,twisted and twisted until the batteries fell out and still couldn't get this flashlight to turn on !!! It would be better if they make a switch instead of twisting !!!! because by the time I get it right and the light was on, the subject or people who hid in the dark corner was already flee or when I twisted it off and put it back, it suddenly turned on itself. Sometimes I twisted it and it would be on for only 5 seconds then off itself !!! It's very frustrated to get it right , I wouldn't recommend this for any law enforcement.