This air vent phone holder is designed for drivers who want a compact, unobtrusive mounting option that keeps the vent area usable. The holder uses movable slide rails and a 360-degree adjustable base, allowing you to position the phone at a comfortable viewing angle without covering the air vent completely. The vent hook extends up to about 1.4 inches and is intended for square-style air vents; round vents are not recommended. The clamp arm is built to accommodate thicker phone cases, including wallet-style and battery cases up to roughly 1.05 inches thick, while the rubber-padded clamp helps reduce scratches on the device. A stainless steel hook with a maximum extension of about 35 mm is paired with rubber contact points on the base to help protect the vent from damage. The holder body is made from PC and ABS materials selected for heat resistance, and the phone-facing panel uses soft silicone to provide a gentle contact surface. One-hand operation is supported for quick placement and removal, making it practical for navigation, calls, and short trips. It is suitable for many sedans, SUVs, and trucks with compatible square vents.