- Depth readings from 2.5 - 600 feet. - Rubber buttons for greater reliability. - Shallow and depth range alarm signaling. - Waterproof front face. - Choose transducer below. (Install as transom mount if hull has coring or aluminum.) - Withstands the harshest marine environments. - Red backlighting for easy night viewing. - Reads in feet, meters and fathoms. - Unit size 2.42" D x 4.75" L. - 2 1/16" cutout.