The RAM MOUNTS Quick-Grip15W Waterproof Wireless Charging Holder with Ball is a universal water-resistant wireless charging cradle for phones. This cradle allows for single-handed placement and removal of your phone while taking advantage of Qi-compatible wireless phone charging. This RAM Quick-Grip Wireless kit for vehicles includes a B-size diamond base featuring a 1' rubber ball - perfect for attaching to your choice of B-size RAM double socket arm. The connected Type-A male pigtail connector features an in-line switch that allows you to turn off the wireless charging module when not in use.