This cage accessory has a total of 35 screw holes (1/4-inch-diameter) infour faces (top, bottom, and sides), to allow future expandability andsystem flexibility. Button operation and media insertion and removal are possible while thecamera is attached to this cage. Cable terminals for HDMI and microphoneare also accessible, without detaching the camera from the cage. Thiscage is designed for quick attachment to and detachment from the camera. You gain freedom to set the system without sacrificing other operability.