Modes: Wide angle high (430 lumens, 5h runtime); wide angle low (32 lumens, 24h runtime); long distance high (300 lumens, 5h runtime); wide angle plus long distance (505 lumens, 2h runtime); green. Beam distance: 14-125yds. Electronic lock-out mode to prevent accidental activation. Last Light feature remembers the previous beam setting. Adjustable nylon headband. Requires (3) AAA batteries (included). Clam packed.