S&O Lights&reg; H1 LED Headlamp Flashlight, 3 Modes + Flashing | 21 White LED Brightness choise: 1 LED, 8 LED, 21 LED and Flashing Comfortable and easy to use Uses three AAA batteries (not included) Adjustable and Flexible head-strap Perfect for running mountaineering, rock climbing, cycling, running, and skiing.