Instead of a pressure switch, which could turn on accidently or turn off when you don't want it off, there is a slide switch. If you want to remove the entire light, it has a quick release feature.
The led light is bright and clear for several hundred feet at night. There is a strobe option that disorients a threat. A run time of 45 minutes on a single battery (included) should be ample for most situations.
I received this product at a discount in exchange for my honest and unbiased review.
HiLight Pro 400 Lumen Pistol LED Strobe Flashlight with Weaver Quick Release Compact and Subcompact Pistols, Black