The light is a bit of a toy. It is confusing somewhat to just turn it on. I think you have to press the button twice, very quickly and firmly, to get the flashlight to turn on. If you press it once the laser will flash on and then off instantly.
to use the laser, yoou must press once and continue to keep the button completely depressed or the laser goes off. It is tiring to have to hold the button down continuously.
If you want the flashlight you press twice quickly and it will come on and stay on and you don't have to hold the button down, But to turn it off, pressing the button will not work, you have to press it twice quickly to get it to shut off. Not a device that is easy or intuitive to use. That's my recollection of it anyway. Seems well built and is a bright flashlight.
The laser is fun to shoot around the neighborhood.