Universal 1″ Ball Compatibility: Compatible with RAM mounts B-size double socket arms, this base features a standard 1" (25mm) ball design for seamless integration into your existing vehicle setup. Constructed from high-strength composite material, it delivers exceptional safety and reliability on any terrain. Advanced Vibration Dampening for Camera Protection: Equipped with a professional-grade vibration dampener, this holder actively absorbs and isolates road-induced vibrations. This crucial technology safeguards your smartphone's sensitive optical image stabilization (OIS) and cameras, preventing long-term vibration damage and ensuring clear photos and videos on the move. One-Second Lock & Release Mechanism: Securely mount or remove your phone in just one second with the quick-lock and rapid-release system. Simply place your device and press to lock; press again to release. An adjustable knob fine-tunes the width for a firm, secure grip with effortless one-handed operation. Camera-Friendly Open Design: Low-profile, open-frame structure guarantees zero obstruction to your phone’s camera, screen, or facial recognition sensors. Enjoy full access to touchscreen functions while your device remains firmly mounted. The 360° adjustable ball head allows easy rotation for horizontal or vertical viewing. 360° Adjustable Rubber Ball Head: The flexible, rubber-coated ball head enables smooth 360° rotation and multi-angle positioning. The rubber surface enhances grip and shock absorption, keeping your device stable and secure during travel. Fully Adjustable with Wide Compatibility: Designed to fit a broad range of smartphones, this holder offers customizable width and arm length to securely accommodate devices from 4.7″ to 7.2″. For optimal security, ensure your phone’s thickness remains under 0.6″. FPN Universal Phone Holder Base for RAM Mounts B Size Double Socket Arm, 1" (25mm) Ball Mount with Vibration Dampener [Camera Friendly] [1s Lock & Release], Fits 4.7-7.2" Smartphones