Includes heavy duty clip that fastens to belts, jackets, backpacks, and purses. Super bright Cree XP-E bulb provides pure, bright white light. LED technology uses very little energy, prolonging battery life. Uses 3 AAA batteries (included, just pull tab to activate).Focus function floods a large area with illumination or focuses a tight beam on a targeted spoot. FSwitch toggles between flashing and solid beam. Flashlight uses very bright Cree XP-E bulb.