Using your Biolite Headlamp is super easy. First, charge it via the USB port until the battery is full. Once charged, put it on your head. You can adjust the strap for a comfortable fit. To turn on the light, press the power button. You can cycle through different lighting modes by pressing the button multiple times. For the red rear light, there's a separate button or option to activate it. When you're done using it, turn it off to save battery. As for maintenance, keep it dry as it has an IPX4 water - resistance rating, which means it can handle light splashes but not full submersion. If it gets dirty, use a soft, damp cloth to clean it. Don't expose it to extreme temperatures or sharp objects. And remember to recharge the battery regularly to keep it in good working condition.