SOS strobe. Strobe. Water resistant. Impact resistant. CREE XHP35 HD LED. 187m beam distance. Single button access to 5 brightness levels and three special modes. Flood lighting system produces wide 100 degree beam angle. Elastic nylon headband. Modes: Turbo (1800 lumens, 30m runtime), High (780 lumens, 1h 30m runtime), Mid (240 lumens, 5h 15m runtime), Low (70 lumens, 15h runtime), Ultralow (1 lumen, 300h runtime). Requires (1) 18650 battery (not included), or (2) CR123A batteries (not included). Boxed with hanging tab.