HL 27 Focusing LED Headlamp, Using Pure Beam Focusing Optic With Twist Focus, 122 Meter 400′ Beam Distance, 309 Lumen Light Output, 3 Hour 45 Minute Runtime, Removable Top Strap, 3 “AA” Batteries Included, Expandable Z Cord In Headband For Added Durability, Adjustable Elastic Straps, Easy To Operate Front Power Switch, Hinged Beam Adjustment To Position Light Where You Need It, Impact & Water Resistant, Weight 7 OZ, 199 G Including Batteries.