Stable Expandable Cup Base: With a simple twist of a knob, the cupholder effortlessly adapts to different cupholder sizes from 3" all the way up to 4.62". Not only does it provide a perfect, snug fit, but it also stays in place without any annoying rattling or distracting noises, ensuring a smooth and peaceful driving experience. Strong & Flexible Rod Mechanism: The Magnetic Cup Phone Holder boasts a robust robotic arm that has been expertly crafted to provide exceptional stability and durability, ensuring it can withstand the rigors of daily use without breaking easily. Its triple ball joints allow for infinite adjustments, effortlessly customizing the holder without impeding gear shifts or interfering with other essential functions, making it a versatile and convenient accessory. Tri-Pivot Cup Phone Mount: EXELIQ laboratory has devoted extensive research and development towards creating a groundbreaking, flexible three-ball joint design. Through innovative engineering, this advanced design seamlessly integrates the mount and the arm with base, while maintaining the superior flexibility of the upper and lower ball joints. This unparalleled combination is sure to maximize your viewing experience. Super Strong Magnetic Force: Equipped with 2 ring magnet arrays with a total of 16 super strong N52 magnets, this magnetic mount provides powerful magnetic suction to hold even large size phones firmly in any different road conditions. Won’t affect the phone signals or damage the phone batteries. Compatible with All Phones: For iPhone 15/14/13/12 series without case or with MagSafe case, just simply snap your phone onto the magnetic mount. For all phones with a regular case, please attach the metal ring we provide to the outside of the case. (NOTE: not charger).