Fenix Flashlights HL22 120-Lumen Headlamp Max 120 lumen output from a single AA battery will throw light 90 meters Four outputs including High-120 lumen (1hr 30min), Medium-45 lumen (4hr 35min), Low-3 lumen (55 hr), and SOS Simple to use one button switch IPX-6 Waterproof, 1 meters for 30 minutes Supported by limited lifetime guarantee from Fenix Lighting, US