Bronze thru-hull transducers are for large boats and boats with in-board motors that make typical transducers ineffective. Not recommended for trailered boats. Professional installation recommended. 30 ft cable and hardware included. This model will work with Wide Optic, Portrait, Panorama, Paramount, 300TX 400TX, Matrix 35, 37; 737; 575. Optional:(Matrix 67, 87c, 97; 727, 737, 747c, 757c, 767, 777c, 787c)