Using the Hornit Nano is a breeze. First, find a suitable spot on your child's bike or scooter to attach the device. It's designed for easy attachment, so you can quickly get it in place. To use the sound effects, just press the relevant buttons. There are 15 different sounds, so your child can switch between bike bells, racing car noises, and magic spells to have fun. When it comes to safety, this device is safe for sensitive ears, but still, don't let your child use it at extremely high volumes for long periods. As for maintenance, since it has an IP33 rating, it can handle splashes and dust. However, it's best to dry it off if it gets wet. Also, keep it away from very dirty or dusty areas for long - term use. Enjoy the colorful lights and playful sounds with your little rider!