The RAM Quick-Grip Wireless is a patented, universal waterproof wireless charging cradle for phones. As part of the spring-loaded RAM Quick-Grip family, this cradle allows for single-handed placement and removal of your phone while taking advantage of Qi wireless phone charging.; Waterproof Qi wireless phone charging cradle features spring-loaded RAM Quick-Grip design and 10W maximum output Kit for vehicles includes wireless charging cradle and B size diamond ball base; attaches to B size double socket arms Powder-coated, marine-grade aluminum, stainless steel components, and high-strength composite for durability and reliability in the most demanding environments Height Range: 5.625" - 6.625", Max Width: 3.125", Max Depth: .7" Backed by lifetime warranty, electronics backed by 1-year warranty