Using the Flare R City rear bike light is a breeze. First, attach the light to your bike using the Quick Connect bracket. It fits securely and can be removed easily when you need to recharge. The light has an auto - brightness feature thanks to the ambient light sensor, so you don't have to adjust it manually. Just turn it on, and it'll adjust according to the light conditions. When it's time to recharge, remove the light from the bracket and plug it into a power source using the included USB cable. As for maintenance, keep the light clean by wiping it with a soft, dry cloth. Avoid exposing it to extreme temperatures or submerging it in water. If you notice any issues with the light's performance, check the battery level or contact our customer support.