Streamlight Septor LED Headlamp is an ultra-bright LED headlamp that lets you choose 1, 3 or 7 LED. Powered by 3 "AAA" alkaline batteries (included) the seven (7) 100,000 hour life ultra-bright, white LEDs. Includes an adjustable elastic head strap and a rubber hard hat strap for versatility. The head tilts 90?ø.