This tail cap with wired dimmer slide switch will replace the Dimmer tail cap on the Coyote Cannon light. Mount the dimmer slide switch on your gun with the included nylon strap or velcro or both. Dimmer slide switch has it's own on/off button on it so you can turn the light on at any preset power. Simply turn the light on and slide the switch to the desired power and then turn it off. As long as you don't move the slide switch, when you turn the light on it will be at the same power