Using the Cosmo 350 - R headlamp is easy. First, charge it fully when you have access to a power source. Once charged, wear it on your head. Press the button on the side to turn it on. You can switch between the all - purpose beam and night vision mode by pressing the button again. When not in use, store it in a dry place. Keep it away from water and extreme temperatures. Periodically check the battery level and recharge it when it's low. This will help keep your headlamp in good condition for many adventures to come.