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Garmin GT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearV CHIRP 500W, 260 455kHzGT21-TM Transom Mount Transducer, Traditional 600W, 50/200kHz, ClearVü CHIRP 500W, 260 & 455kHzPerfect for coastal and offshore fishermen who want traditional sonar and CHIRP ClearVü sca... Learn More