Universal 17mm ball head base: This base adopts a universal design and is suitable for most car phone holders and GPS holders, providing you with a wider range of choices. Car outlet phone holder: This base can be installed on the car outlet and used with the corresponding mobile phone holder to help you use mobile phone navigation or answer calls safely and conveniently. GPS holder: It can be used to install the GPS holder, making it easier for you to view navigation information while driving, improving driving safety and convenience. Car outlet clip accessories: Suitable for mobile phone holders installed on car outlets, providing more installation methods, ensuring that you can choose the most suitable position to install the holder. Versatile accessories: This 17mm ball head base is equipped with a variety of accessories, which can be applied to different cars and usage scenarios, adding convenience and practicality to your driving experience.