Using your GRATI - LITE™ M Series Headlamp is easy. First, insert 3 AAA 1.5V batteries into the battery compartment. Then, you can turn on the headlamp and switch between the 3 lighting modes according to your needs. The wide - angle beam is great for illuminating a large area, the 32° center beam gives a focused light, and the 86° ambient light beam provides a softer, wider glow. You can detach, rotate, or slide the headlamp to adjust its position. The powerful magnet on the back allows you to attach it to metal surfaces. When you're not using the headlamp for a long time, use the shut - off mode to save battery. To maintain your headlamp, keep it clean and dry. Avoid exposing it to extreme temperatures or moisture. If the brightness starts to dim, it's time to replace the batteries.