The RAM X-Grip Phone Holder with Ball & RAM Vibe-Safe Adapter (RAM-HOL-UN7B-462) is a combination of the classic RAM X-Grip device holder and the RAM Vibe-Safe - our vibration damping accessory is designed to protect electronic devices from a wide range of vibration frequencies. The RAM X-Grip can rotate between portrait and landscape by loosening the center screw. It is compatible with B size RAM components, making it easy to upgrade your current mounting solution. This product comes with an optional device tether that is recommended for outdoor applications. The holder is compatible with handheld devices that will fit the dimensions listed below, it is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.