5 modes include: High, Medium, Low, Flash, and SOS. High offers 1500 lumens of light. Medium is more battery efficient 550 lumens. Low is the more battery efficient 250 lumens. Flash is a classic strobe feature for emergencies. SOS is a strobe feature that produces the signal for distress. Technology packed with durability all over. Architectural grade aluminum body for corrosion resistance and drop test durability. Our Cree XHP 50 Chip are at the front of LED technology offering a bright crisp light with little whiteout. The Zephyr 9AA offers the perfect blend of utility, tactical, and practical. Built in belt clips allows for EDC Everyday Carry ability, while the black architectural body offers users both practical, tactical and outdoor use. Soft Switch technology allow for seamless transition between High / Medium / Low / Flash / SOS Modes Means You Will be Ready For Anything That Comes Your Way. Cycle through these different settings by clicking on the button.