The zefal z console smartphone holder allows you to use your iphone while you39re riding so it39s perfect if you want to use your phone as a gps or monitor your training this smartphone holder consists of a completely waterproof case and it protects your phone against bumps and impacts it also has a 360deg quick release mount which allows you to use your phone either portrait or landscape and you can still easily use the touch screen this phone case is compatible with the iphone 4 4