The YakAttack Track Mounted CellBlok is a track mounted battery box with a top surface that serves as a mounting platform for the display and transducer deployment arm. No more drilling holes in your kayak or routing wires. Simply loosen the 2 track mount knobs and the CellBlok allows you to quickly and easily move your depthfinder from one kayak to another. RAM ball mounts and transducer deployment arm not included.