The Brila 550 LED Headlamp will stay secure for all your outdoor adventures with its included top stability strap and even weight distribution between the front LED and rear battery pack. The easy-to-use focus control adjustment provides a long-distance spot beam or broad flood beam at up to 550 lumens on high and runs for up to 55 hours on low. Brila™ 550 LED Headlamp Features: Provides up to 550 lumens of bright, clean light on high. Runs for up to 55 hours on low. Adjustable head strap for comfortable wear. Features front white light modes and rear red light modes. Water-resistant IPX4 (protected against splashing water from all directions). MODES: Front: HIGH; MEDIUM; LOW; SOS FLASHING; OFF. Rear: STEADY RED; RED SOS FLASHING; OFF. BATTERIES: 3 AA alkaline batteries (included). Brila™ 550 LED Headlamp Modes WHITE HIGH (550 lumens - 4.5-hour runtime) WHITE MEDIUM (225 lumens - 15-hour runtime) WHITE LOW (40 lumens - 55-hour runtime) SOS FLASHING (90-hour runtime) RED STEADY (130-hour runtime) RED SOS FLASHING (365-hour runtime).