Lowrance Tm185m Medium Chirp 9-pin Transom Moun
. The transducer operates at a frequency range of 85-135 kHz, and also features urethane housing for long lasting and high performance. It is designed for offshore fishing and freshwater anglers, and smaller boats up to 25 feet long.The Navico XSONIC TM185M Transducer is a transom mount transducer featuring CHIRP Technology that reveals fish in shallow and murky waters at medium depth of up to 1,500 feet, along with ultra-clear target resolution.