Imagine tooling down the bike path, your iPhone 4 playing your favorite tunes… out loud… from your… handlebars? Yeah, the BONE Bike Horn is designed to do exactly that! Thanks to its retro flared bell shape, it boosts your iPhone’s natural volume level without any electricity! The hook-and-loop fastener on the back keeps the Bike Horn (and your iPhone) securely mounted to your handlebars.
There are five colors for you to choose：