Despite its light, compact design, Princeton Tec's Byte Headlamp delivers powerful, bright light perfect for nighttime outdoor activities. Select the white 50-lumen Maxbright LED to cut through the darkness or the red ultrabright LED to preserve your nightvision while illuminating your surroundings. Features Asymmetrical single-arm bracket, easily accessible battery-door enclosure and large push-button switch. Uses two AAA alkaline or lithium batteries (included). Runs for up to 146 hours on red beam. Wt: 2.3 oz.