1. Very functional: Answering the phone calls when driving, Mobile phone navigation;. 2. The clip is adjustable: The max opening is 76 mm, perfect fits for 4.8inches mobile phones;. 3. Safety: The device is highly compact with the steer wheel, can be moved freely, no security risk;. 4.Protection: The device is embedded with soft silicone pad, which protect your phone from scratching or gashing ect;. 5.Elastic fixation design: With elastic fixation rubber band, the size of steer wheel won`t effect the installation;.