The LED Lenser (R) SE03 lightweight Headlamp does not compromise on functionality, SE03 features Smart Light Technology for switching quickly between high and low power and signal mode, Advance Focus System, It boasts 3 high-end white LED bulbs and 1 glare-free red LED light - housed in a rotating head for flexibility, Functional carabineer clip for travel, Only 3.4 ounces, 90 lumens max., 40 Meter distance max., Battery life of 25 hours on low (20 lumens) or 7 hours on high (180 lumens), IPX4 Weather resistance, (3) AAA batteries included, Adjustable washable and comfortable strap. Lamp: 1 1/2"h x 2 3/4"w x 1/2", Headband: 21".