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.