【4-in-1 Multifunctional Car Cup Holder】: This isn't just a car cup holder; it also serves as a convenient cell phone and card holder. The car cup holder extender can hold both the driver's and passenger's cups or drinks simultaneously. It features a compartment for storing your phone or cards and a space for aromatherapy. It boasts a unique design and multiple functions. 【Adjustable 360° Rotation】: The base can rotate freely 360°. This allows you to adjust the bottom of your drink to any position that won't obstruct your view while driving. The phone or card slot can be placed on the left.or on the right, allowing you to easily answer hands-free calls, play music, or charge your phone. It keeps your phone always in view without obstructing your vision, ensuring your driving safety. 【Retractable, anti-slip and shockproof base】: The bottom is equipped with anti-slip silicone and shock-absorbing foam, which allows the car cup holder to stay firmly in place on the cup holder during the journey, so that your phone does not fall and water and drinks do not swing and spill. 【Multi-Size Compatibility】: You can install any smartphone up to 4.13 inches (10.5 cm) wide by simply pressing the button on the right side of the cup holder extension with phone mount. There are silicone bands inside the cup holder; the cup size it can hold varies from 6 cm to 9.5 cm (2.35"-3.75") inches; the car drink holder is adjustable from 6.5 cm to 8 cm (2.55"-3.15") inches.