Waterproof Qi compatible wireless phone charging cradle features spring-loaded RAM® X-Grip® technology and 15W maximum output. Designed with spring-loaded RAM® X-Grip® All four arms feature rubber-coated caps that hold your phone firmly in place, and the open design keeps buttons and switches accessible on the sides of phones. A device tether is included that’s recommended for outdoor applications. In addition, a support leg can be adjusted to the ideal position or removed altogether. With the RAM® Tough-Claw™ base, you can easily attach the wireless phone charger to round, square, and odd-shaped rails and bars ranging from .625” to 1.14” in outer diameter. 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. For in-vehicle charging, attach the pigtail to the included 1.2m Type-A male to Type-A female extension cable. This kit includes a hardwire charger.