【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 1KG; Vertical suction: 12kg Horizontal suction: 20kg 【Double-headed Design】the magic arm is equipped with 2 ball head, which are 360 rotatable, enable to get the ideal angle for shooting 【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】3inch Suction Mount*1; Phone Holder*1; Go pro Adapter*1;