Simply attach the suction cup mount to the windshield of your vehicle for an easy and safe way to view your gps or other electrical equipment. The rubber ball and socket technology allows for adjustment and perfect viewing angles. High quality materials ensure your device is safe, secure, and within easy reach. RAM's patented design also dampens shock and vibration helping to extend the life of your mobile device. The round base is a flat 2.5" diameter base; this mount has pre-drilled holes, including the universal AMPS hole pattern. Components: RAM-B-201-C, RAM-B-202, RAM-B-238, RAP-224-1. When attaching the suction base, it must be clean and dry and so must be the surface it affixes to. An alternative method is to attach an adhesive rose pad the RAP-350 on to the dash area and fix the suction base onto it.