The bike bell has a simple and portable small shape. Jingle at 90-100 decibels, loud enough to warn pedestrians and passing vehicles that you are coming behind them, loud enough to get their attention. Made of a high-quality PP, aluminum alloy shell, and stainless steel pick. Unscrew the bike bell for the kids' screw, then put it on the handlebar, tighten the bolt until snug, but please do not be too tight, otherwise, the bike bell can't ring, suitable for 0.87-0.94inch handlebar.