Whitecap Device Holder w/Suction Cup Mount Mobile. The Whitecap Mobile Device Holder features a 316 stainless steel base with a diameter of 4 1/2" that is resistant to corrosion and battery failure. Whitecap Mobile Device Holder w/Suction Cup Mount is easy to install with its "suction cup magic". Simply place the suction cup over any smooth flat surface and press the pump button repeatedly until the Whitecap Mobile Device Holder w/Suction Cup Mount disappears into the body of the suction cup. If the cup starts to lose suction simply pump to restore suction. The Whitecap Mobile Device Holder w/Suction Cup Mount is easy to squeeze so the release tabs on the suction cup will be fully visible so you can see what's going on without looking. Specifications for Whitecap Mobile Device Holder w/Suction Cup Mount: Manufacturer: Whitecap Color: Black Features of Whitecap Mobile Device Holder w/Suction Cup Mount Suction Cup Mount Mobile Device Holder Height - 6" Base Diameter - 4-1/2" Base Material - 316 Stainless Steel Suction Cup mounts to any flat smooth surface Install on tabletops vertical and overhead surfaces or glass Easy to install press the pump button repeatedly until the white stripe on the pump shaft disappears into the body If the cup starts to lose suction the white stripe on the pump button will appear re-pump to restore suction To releasesqueeze the release tabs on the face of the suction cup Phone NOT Included Package Contents: Whitecap Mobile Device Holder w/Suction Cup Mount Whitecap S-1810C: Device Holder w/Suction Cup Mount Mobile