Using the Magic Shine MJ900S is a piece of cake. First, use the universal Garmin mounting system to attach the light to your bike's handlebar. Make sure it's firmly in place. If you're using it on an e - bike, it will automatically adjust to the voltage. The battery pack can be recharged via USB. You can also use it as a backup power bank when needed. When it comes to the daytime running light, just switch it on for added safety. For maintenance, keep the light clean and dry. Avoid exposing it to extreme temperatures. If it gets wet, dry it thoroughly before storing it. This will help ensure your light stays in top - notch condition for a long time.