Tactile indicator on rotary knob for IR LED position; Powers on at low output and progresses to the highest output in 4 discrete steps; Cord attachment holes provided in battery compartment cover capable of supporting 25lb of load; Tethered battery compartment cap facilitates battery replacement in the dark without losing cap; Includes 2 "AA" Alkaline batteries; Push-button switch enables/disables selected illumination source; Double click to initiate high-output strobe of selected illumination source; High-impact, super-tough nylon construction offers exceptional durability and weather resistance; Clamshell packaging