Using your Mini Hornit LIDs kids helmet is easy. First, adjust the straps to fit your child's head size properly. Make sure the helmet sits level on the head and the straps are snug but not too tight. To turn on the integrated LED light, just press the button on the light unit. You can switch between the 3 modes by pressing the button again. When it comes to maintenance, keep the helmet clean by wiping it with a damp cloth. Avoid using harsh chemicals as they may damage the helmet. Replace the 2x AG3 cell batteries when the light starts to dim. Always store the helmet in a cool, dry place. And remember, check the helmet regularly for any signs of damage and replace it if needed to keep your child safe.