SureFire Sidekick Ultra-Compact Triple-Output Keychain Light High-performance LED and special faceted reflector produce broad, smooth, 300-lumen MaxVision Beam optimized for the human eye Easy click-type switch permits access to all 3 output levels with repeated presses Micro-USB charging port permits simple recharging of integral li-ion battery Compact, lightweight polymer body is weather resistant; features split ring for easy attachment to keys or carabiner clips Always accessible light provides countless utility uses, including emergency preparedness