Echonautics BT70MA600-18 600w 80-130kHz Medium CHIRP 18d Tilted Element Bronze THEchonautics BT70MA600 80 130kHz Medium CHIRP 600watts 18 Tilted Element Model: BT70MA600 18 A low profile thru hull CHIRP transducer, that matches vessels deadrise to specific angle. Designed to minimize drag and to perform at high speeds Specifications Function Depth and Temperature frequency CHIRP 80 130kHz Mount style Thru Hull Tilt deadrise 18 tilted element ; for 16 to 24 hull deadrise Material Bronze RMS Power 600 watts Beamwidth 24 to 17 @3db