550 lumens with reactive distance sensor and adjustable non slip head strap. 3 modes: Spot beam, Wide beam and Auto - spot to wide. Runs on 4x AA alkaline batteries (included). Output (lumens): High 250, low 25 Beam Distannce: 550 meters Runtime: High 7.5hrs, Low 169 hrs Impact Resistance: 1m Batteries: 4x AA Alkaline (included) Light Source: Cree XPG-R2 Size: L85 x D45 x H48mm Weight: 283g
This headlamp has reactive distance sensor and automatically changes from long distance spot mode to short distance flood mode.