The RAM Quick-Grip™ device mount is capable of holding a broad range of electronic devices. The spring loaded mechanism and the adjustable side keepers allow for a secure grip on your device. Whether it is a cell, GPS, blue tooth speaker or anything that will fit in the dimensions of the cradle, your electronics will be secure. Features: Cradle clamping dimensions: Height range: 4.75" - 5.75". Width range: 2.19" - 3.25". Max depth: 0.72". Material: Marine-grade aluminum and high-strength composite. Ball size: 1" rubber ball "B" size. Backed by a lifetime warranty.