These Power Beams are Huge! Measuring 4 inches by 6 inches, each Power Beam has 18 high intensity LED light bulbs. These LEDs give off enough light to light your way for up to 1.25 miles. It uses 4 replaceable AA batteries (not included) which last up to 30 hours, and has two settings: One flashing, and the other steady. The Power Beam also has a powerful rare earth magnet back if you want to attach this to car fenders, lockers, etc... and just in case you break down on the way to your party, this giant light makes an awesome roadside hazard marker.