Water and Shock-resistant. Bright clean light up to 300 lumens-runs 30 days continuously on "low" and runs 16 hours continuously on "high". Lifetime LED is unbreakable and never needs replacing. Tough anodized aircraft-grade aluminum with rubberized casing for a sure grip. High, low, and SOS flashing modes. Moonbeam technology lens casts a broad, clear beam. Lifetime Limited Warranty. Runs on 3 D Alkaline batteries (not included).