Version 4.0. The original mountain bike bell. Trail awareness when you need it, silence when you don’t. A simple on/off lever controls the internal clapper. Slide it down for on, or up for off. The motion of the bike activates the sound. Designed for safe, friendly passing and signaling on shared use trails, and alerting wildlife, including bears and mountain lions. Mounts quickly and easily anywhere on your handlebars. Easy to take on or off, depending on riding conditions. New since April 2021, we've beefed up everything. With a much stronger on/off lever and a new steel collar internal shank where the bell meets the plastic, this bell won't break even in the gnarliest crashes. Plus a longer life internal cable.