The Humminbird XTM-9-28-T Trolling Motor Transducer mounts on most trolling motors. The Humminbird XTM-9-28-T Trolling Motor Transducer’s low-profile shape reduces drag and hang-ups on weeds. Humminbird XTM-9-28-T Trolling Motor Transducer features: Single/Dual Beam28/16°;200/455kHz