Specification: Color:Black Material: Plastic Diameter of Sunction Cup: 5.5cm Quty:1pc How to use: 1.Move off ion paper from the bottom of cupule. 2.Make cupule of foot-rest direct towards windshield or dashboard. 3.And press then lock it. Package Included: 1x Suction Cup Mount 1x Bracket Cradle NOTE: The size is just for reference, there maybe exist a measurement error, please check carefully before you buy it. Color may vary slightly due to different calibion of each monitor.