The RAM Twist Lock Suction Mount Arm simply attaches to the windshield of your vehicle for an easy and safe way to view your unit. RAM's rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality materials ensure your item 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. 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.