The Nite Ize LED Upgrade Kit contains everything you need to turn your incandescent AA Mini Maglite into a super-efficient L.E.D. flashlight, with an on/off tail cap switch you can easily operate with one hand. Just replace you AA Mini Maglite s existing bulb with this ultra bright, two pin/three bulb L.E.D. module (simple instructions on the package), replace the tail cap with our Nite Ize Tail Cap Switch, and presto! You re done. You ll instantly enjoy superior illumination the white L.E.D. bulbs emit a high-quality, bright light, as opposed to the dimmer yellow glow of incandescent bulbs. With its long (100,000 hour) life, you ll never have to replace the bulb again.