The Barska 25-Lumen Water Resistant LED Headlamp is a comfortable and convenient hands-free headlamp. Its high-efficiency LED light generates a bright 25-lumen beam and the tilting head has a hinged attachment for positioning the beam accurately. The light has a range up to 98' (30 m). It's water resistant and shockproof. Runtime for one set of 3x AAA batteries (not included) is 40 hours. The head strap is adjustable, so one size fits all.