The Garmin gt15m-ih is an in-hull, 8 -pin transducer with 4 plastic tanks that a features mid-band CHIRP traditional sonar (85-165 kHz) and has a power rating of 600 W. It has a beam width of 24-13 degrees and has a maximum depth of 1, 900 ft in freshwater.
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Frequency: CHIRP Mid-band (85-165 kHz)
Power Output: 600 W; Beam Width: 24° to 13°
Maximum Depth: 1,900′
Number of Pins: 8-pin; Cable Length: 20′