1: closer to the driver hands-free when answering the phone super convenient navigation imminent. 2: the biggest opening 67 mm fully support the current popular smartphone iPhone Samsung navigator etc. 3: elastic fixed design: using elastic fixed rubber belt steering wheel also does not affect the size of the installation. 4: easy installation no additional tools it only takes a few seconds to complete it. 5: security: this equipment is highly compact steering wheel can move no security risks. 6: protection: the device is embedded soft silicone pad to protect your phone from scratch or scratches etc. 7: environmental protection material made of wear-resisting high toughness can be used for a long time. 8: the device does not affect the wheel set of installation.