Arkon s GPS032 handlebar mount fits GPS devices up to 4.3 inches in screen size and is compatible with selected Garmin TomTom and Magellan GPS. This mount package includes Arkon s Bicycle/Motorcycle Handlebar Mount with Water-Resistant GPS Holder. The bicycle/motorcycle mount fits on handlebars measuring up to 33mm in diameter and is easy to install with a Phillips screwdriver. The mount s swivel ball adapter head rotates 360° providing the ultimate flexibility in viewing the smartphone from any angle. The water-resistant case zips open for easy access to the device and features a touch-compatible plastic face that allows you to operate the GPS with the case on.