Car Back Seat Rack Adjustable width pressing design: width can be adjusted as needed to fit different rear seat gaps. Includes a headrest bracket for phone, providing secure mounting for rearseat use. Safe and stable back seat holder with buckle design: buckle mechanism ensures a secure attachment to the headrest area, helping keep the rack steady even on rough roads. Threestage design: three interconnected components work together to enhance overall stability and reduce movement during driving, giving reliable support for your device. Headrest bracket for phone: made of durable material and designed for compatibility with common headrest configurations and phone sizes, offering a dependable mounting solution. Durable and practical construction: built to withstand daily incar use while maintaining stable performance across a range of car models and seating layouts. 23 practical use scenarios Long family trips: mount a phone on the headrest bracket to provide rear passengers with easy access to navigation, music, or videos, keeping the driver focused and the cabin organized. Rideshare or taxi service: securely attach the rack to the rear seat to hold the driver's or passenger's phone for navigation, calls, or appbased orders, reducing device clutter on the center console. Commuting and carpooling: use the adjustable width to fit various seat back gaps and keep essential devices within reach of rear passengers, improving convenience and reducing distractions for the driver.