Take one of SureFire's virtually indestructible LED emitters. powers it with an integrated, rechargeable LiPo battery and package it in a tough, polymer body. Then make it small and light enough to attach to a keychain. That's the SureFire Sidekick, small yet powerful enough for both everyday use and emergencies, with three useful levels of output for security and peace of mind. It operates just like a modern key FOB, igniting the dark well past 50 meters. Its lower settings offer more runtime while providing ample light for reading, close-up work or even navigating outdoors while preserving dark-adapted vision. The Surefire Sidekick gives you the confidence that you'll always have a reliable, powerful light at your disposal.