Contains everything needed to turn an incandescent AA Mini Maglite into an LED flashlight with an on/off tail cap switch operated with one hand Replace the AA mini maglite existing bulb with two pin/three bulb LED module (simple instructions on the pack age) and replace the tail cap with the tail cap switch The LED bulbs are nearly shockproof and emit a bright white light as opposed to the dimmer yellow glow of incandescent bulbs Black