Using the Topeak Omni Ridecase is easy. First, attach the included strap mount to your bike's handlebar or stem. Then, simply place your smartphone with a 4.5 - 6.5 inch screen into the case. The ultra - elastic silicone grippers will hold it securely. You can rotate the mount to view your phone in portrait or landscape mode as you like. When using it with other RideCase® mounts, just use the QuickClick® system to connect them. As for maintenance, keep the case clean by wiping it with a soft, dry cloth. Avoid using harsh chemicals. Also, make sure not to over - stretch the silicone grippers to maintain their elasticity. When not in use, store it in a cool, dry place.