The clips is adjustable: The Max opening is 76mm, perfect fits for 4.8 inches mobile phones. Elastic fixation design: With elastic fixation rubber band, the size of steer wheel won’t affect the installation. Easy installation: No need extra tools, just a few seconds to finish it. Safety: The device is highly compact with the steer wheel, can be moved freely, no security risk. Protection: The device is embedded with soft silicone pad, which protect your phone from scratching or gash, etc.