Headrest bracket for phone: easy to install and remove, designed to attach to the car rear pillow bracket for quick setup and removal. Car back seat holder: press design with adjustable width to fit a range of smartphones, allowing ondemand sizing without tools, and compatible with the car rear pillow bracket. Car rear pillow bracket: designed to work well with all smartphones, providing reliable compatibility when paired with the car back seat holder and headrest bracket. Car back seat rack: threestage design with each component tightly linked to provide better stability for the equipment, delivering stable performance even on rough roads, compatible with the car rear pillow bracket. Key benefits and practical use Simple installation and removal: Attach and detach the setup quickly, keeping your vehicle flexible for passengers and drivers. Wide compatibility: Works with all smartphones, ensuring you do not have to worry about model or size. Adjustable width: Press design lets you adjust width easily to secure different phone sizes without tools. Enhanced stability: Threestage rack with closely linked components creates a solid mounting system that resists wobble and bumps. Comprehensive solution: Integrates with the car rear pillow bracket for a cohesive mounting option in the back seat. Use scenarios Family road trips: Mount a smartphone on the rear seat for passengers to watch videos or view navigation, keeping kids entertained and reducing the need for handheld devices. Rideshare or taxi use: Passengers can place a phone for hands video calls or streaming content, improving comfort and convenience without distracting the driver. Carpool or shuttle services: Securely position a phone for backseat passengers to use as a GPS or media display, maintaining a stable viewing angle throughout the ride.