Leofoto Adjustable Smartphone Clamp - Arca Base Black. The height of the phone clamp can be adjusted from 56-90mm / 2.2-3.5 inches with a slider on the side that locks the height in place. Specifications for Leofoto PC-90II Adjustable Smartphone Clamp - Arca Base: Manufacturer: Leofoto Color: Black Quantity: 1 Features of Leofoto PC-90II Adjustable Smartphone Clamp - Arca Base Aluminum CNC Machining Package Contents: Leofoto PC-90II Adjustable Smartphone Clamp - Arca Base Leofoto PC-90II: PC-90II Adjustable Smartphone Clamp - Arca Base Black