This dimmer tail cap will work with all Sniper Hog Light 30LR, 38LRX, 50LR, 50LRX, 66LR and 66LRX lights and replaces the current tail cap you have on the light. Will not work with any other model lights. Features a on the back of the tail cap that you turn to adjust your lights brightness from 10% power to 100% power.