RAM Mounts Magnetic Power Plate The Rap-300-1U, RAM Magnetic Power Plate Iii, is a versatile accessory specially crafted to secure different devices such as radar detectors and smartphones. The plate features two robust rare earth magnets, a composite cradle, and an adhesive metal plate. To affix your device to the magnet, simply attach the metal plate to the rear surface of your device. This product comes with a rectangular metal plate measuring 50mm x 38mm x 0.08mm with an adhesive backing for easy installation. Material: High strength composite