The YakAttack RotoGrip Phone Holder Pro features innovative RotoGrip technology for quick, one-handed operation and is designed to securely hold most smartphones. It includes two adjustable rubber wheels and accommodates devices from 2.75” to 3.625” wide and 0.303” to 0.625” thick. The maximum height of the mount is 3.5”. This model includes a Universal Smartphone Harness and Tether, a track-mounted 1” Screwball, and a 2.5” Ball Connector, but does not include a mounting base or double socket connector. The Screwball is compatible with YakAttack GearTrac, MightyMounts, and most factory-installed kayak track systems. The built-in 1” ball system allows for easy articulation and adjustment of the phone holder's width and position. To adjust, pull against the ball to release the spring-loaded gear and twist to fit your phone. Secure your phone by adjusting the arms so it rolls firmly into place with one-handed operation. The Universal Smartphone Harness and Tether feature a flexible silicone interface that accommodates devices with or without cases, keeping your phone snug. The harness includes a coiled coated steel tether (9" coiled, 48" fully stretched) with a locking carabiner that attaches to the phone holder's tether point for added security. The harness ensures easy access to your phone's functions without obstructing the camera lens. Made from UV-resistant, high-quality injection-molded polymers and stainless steel hardware, the phone holder is built to last in harsh outdoor and marine environments and is backed by a Built for Life Guarantee. While it is designed to securely hold your smartphone on the water, the manufacturer is not liable for any device loss, damage, or malfunction during use. Proper use of the harness and tether is essential for securing your phone. Compatible with brands like Samsung, Google, and Apple, including models such as iPhone 15 Pro Max, iPhone 14/15, Galaxy S24 Ultra, Galaxy A15, Google Pixel 7/7A, and Pixel 8/8A/Pro.