YakAttack CellBlok Battery Box and SwitchBlade Transducer Arm Combo Marine Electronic Accessory - Our CellBlok system is the simplest solution on the market for attaching a fish finder to a kayak, and to make it even easier we now offer the CellBlok paired with our SwitchBlade Transducer Arm. To complete the install all you need is a YakAttack fish finder mount compatible with your make and model of fish finder and a battery. Depthfinder installation on kayaks just got smarter. The YakAttack CellBlok is a track mounted battery box and its top surface serves as a mounting platform for the YakAttack SwitchBlade Transducer Arm and YakAttack fish finder mount. No more drilling holes in your kayak or routing wires! Simply loosen the two track mount knobs and the CellBlok allows you to quickly and easily attach or remove your depthfinder. A minimum of 10.5" of track is required to attach the CellBlok. This updated version of the CellBlok was new for fall 2020 and features an injection molded construction compared to the original model. The change in material has resulted in a 25% weight reduction (now 1.4 lbs) and we also increased the size of the cable wraps to accommodate the larger wires used in today's fish finders. Interior Space - 6.375in x 4.25in x 2.60in Exterior Dimensions - 10.25in x 6.75in x 3.50in