Brightness: 500 LumensBeam Distance: 165 yards (high), 90 yards (medium), 45 yards (low)Run time: 2 hoursBatteries: Included AA x 4Function: High-Medium-Low-Flash-SOSTilt control for different working positionsRubberized headband stitching for a better fitEasy to load and durable battery packButton protector to avoid accidental switching on when not in use