The Streamlight TAILCAP PROTAC HL & HL3 (model 880111) provides instant, reliable activation for your compatible Streamlight ProTac HL or HL3 flashlight. This tailcap switch offers momentary or constant-on functionality, granting you precise control over your light output in tactical or everyday situations. Ruggedly constructed for dependable performance, the PROTAC HL & HL3 Tailcap allows for quick and easy operation, ensuring immediate light when you need it most.