The space gray Khronos Universal SSD Holder from Tilta is an accessory that attaches to your Khronos Case for the iPhone 15 Pro or Pro Max and lets you mount an external SSD for recording video. In place of an SSD, it may also be used for mounting a power bank or other compatible accessory ranging from 1.96 to 2.75' wide and up to 0.59' in height.