Mark Miller of Loadout Room features the newly released SwitchBack Large 2.0 in a review of its compelling features. 
“There is a lot of confusion about shooting with lights. The big disconnect is that weapon mounted lights are great for shooting, but they muzzle every thing you illuminate when searching. If something makes noise in my house at night, I don’t want to muzzle the wife and kids, the cat I am not so concerned about. Hand held lights are better for searching and allow me search in a situation where I don’t want to draw my gun or to cover a threat and scan my surroundings. Shooting with a flashlight requires an awkward grip to align the flashlight and firearm.
The SwitchBack Flashlight Rings clip to your pocket and lets you rapidly deploy a flashlight for searching or single-hand shooting techniques. You can reorient the flashlight for use with a two-handed grip and still perform reloads and clear malfunctions without having to stow or hang the light.”