Nitecore HA15 Ultra Light Headlamp NC. 63" x 1.13" x 1.31". SOS strobe. Water resistant. Impact resistant. Rechargeable. Clip. 6-Core UHE LEDs. White and red light. TrueVision optical matrix lens system. Woven head band with reflective strip. Includes diffusing stuff sack. Modes: Lithium battery High (400 lumens 3h 30m runtime); Mid (200 lumens 5h runtime); Low (100 lumens 10h 30m runtime); Ultralow (6 lumens 114h runtime); AA Battery Mid (200 lumens 4h runtime); Low (100 lumens 9h runtime); Ultralow (6 lumens 82h runtime); Red light High (15 lumens 10h runtime); Low (5 lumens 25h runtime). Made from special PC plastic and TPE material with impact and low temperature resistance. Dustproof. Weight: 43g. Requires (1) Lithium battery (not included) or (1) AA battery (included). Boxed with hanging tab. Package Contents: Nitecore HA15 Ultra Light Headlamp