【New Technology - Pump-actived】 With the start of the manual air pump, the gas inside the cavity is continuously pumped out, and the air pressure then drops to a negative pressure state. The vacuum suction cup will be pressed on the surface of the object under the action of external atmospheric pressure, thus realizing vacuum adsorption | 【High Quality for Safe Use】Made of high quality aluminum alloy and premium rubber, stick the surface tightly, load-bearing capacity up to 3KG; Vertical suction: 40kg Horizontal suction: 60kg | 【NATO Rail Magic Arm】NATO camera mount able to quick install on and release from the suction base; durable metal material give camera strong supper; dual 360°ball head allows to adjust the angle at will; includes a action cam adapter, enable to work with gopro/dji action 3 | 【Rich Expansion for Multi Mounting】 Equipped with multiple 1/4'', 3/8'' threads and adapters to achieve easy expansion, able to connect ball head and magic arm | 【Wide Application】 Attached to any smooth surfaces firmly with super suction power, such as boat, metal/ceramic surfaces, car windscreen/windshield, plate glass door, car door, car hood, car top roof, truck lid,car window etc | 【Packing List】4.5inch Suction Mount*1; Ball Head Magic Arm*1; NATO Rail*1; Go pro Adapter*1; 1/4" Screw*2; Hex Wrench*1; Storage Bag*1 | NOTE: The action camera adapter is packed with the paper box, but not in the paper box, please check the package clearly. IF THERE GO PRO ADAPTER MISSING, PLEASE CONTACT US, WE SEND YOU ANOTHER ONE