This little powerhouse delivers far more light than you would ever expect from a light this size. Using just 3 AAA batteries, this light can throw up to 300 lumens, which makes it perfect for looking in holes and under ledges by day or underwater trekking by night. With a magnetic switch that provides variable power, you control the battery duration. Slide it up to 300 lumens for a 1-hour duration or slide it back to 10 lumens and get an amazing 24-hour duration. Magnetic switch offers variable light output Brightness - 10 lumens to 300 lumens Battery duration - 24 hours to 1 hour Depth rated to 330 ft / 100 m Beam distance - 800 ft / 240 m Uses 3 AAA alkaline batteries (not included)