CellBlok, track mounted, accepts 7.2 Ah and 9 Ah batteries, box only. Requires at least 10.5'' of GearTrac. Interior Space - 6.4'' x 4.3'' x 2.8'' Exterior Dimensions - 10.25'' x 5.25'' x 3.75'' CellBlok box only with hardware to attach to GearTrac. RAM ball mounts and transducer deployment arm not included.