"The YakAttack CellBlok Battery Box and Switchblade Transducer Arm Combo makes installing a fish finder on a kayak simple, removable, and drill-free. The track-mounted CellBlok serves as a battery box and mounting platform for the SwitchBlade transducer arm and a compatible YakAttack fish finder mount, letting you attach or remove your setup by loosening 2 track mount knobs. The injection-molded CellBlok weighs 1.4 lbs and features enlarged cable wraps for large modern fish finder wires, while the hydrodynamic SwitchBlade arm helps reduce gurgle, resistance, and water turbulence for a faster, quieter over-the-side transducer setup. The patented SwitchBlade folds compactly, articulates easily in and out of the water, and can be shortened to fit nearly any kayak. Compatible with most factory-installed kayak track systems and many aftermarket tracks. FeelFree Kayaks, 3 Water Kayaks, and Jonny Boats require a separate adapter. Assembly required. Fish finder mount, GearTrac, and battery not included. Made using premium materials designed for harsh marine environments. Mfrs. limited lifetime warranty. Track-mounted battery box and fish finder mounting platform Drill-free installation with quick-attach design Includes CellBlok and SwitchBlade transducer arm Hydrodynamic arm reduces gurgle, resistance, and water turbulence Patented arm folds compactly and can be cut or shortened Compatible with most kayak track systemsSpecs: Exterior: 10.25"" x 6.75"" x 3.50"" Interior: 6.375"" x 4.25"" x 2.60"" Switchblade Length: 25.75"" CellBlok Weight: 1.4 lbs Minimum Track Length Required: 10.5"""