Tigra Sport RainGuard MountCase Bike Kit for Galaxy S4 LIGHT AND STRONG - tough, multi-layered polycarbonate construction that adds less than 2 ounces to your ride WATERPROOF - includes RainGuard(TM) that keeps your Galaxy S5 rainproof, dustproof, dirt proof, and sweat proof SECURE VERSATILE MOUNTING - mount to stem or bars, for horizontal or vertical viewing TWIST, LOCK, AND RIDE - mounts in seconds with only a twist and push of your hand IN-BRACKET SAFETY LOCK - once mounted, engage the safety lock to keep your Galaxy securely mounted on road and trail