The Garmin 300 W plastic transom mount (Airman TM150M) with CHIRP technology has a maximum depth of 1,500 ft.; an operating frequency of 95 to 155 kHz; a beam width of 26/17 degrees; and mounts on a 3 to 20 degree transom.

Airmar TM150M300WThis 300 W plastic transom mount with CHIRP technology has a maximum depth of 1,500 ft; an operating frequency of 95 to 155 kHz; a beamwidth of 26/17 degrees; and mounts on a 3 to 20 degree transom.Transducer kit comes with installation instructions. Follow the instructions carefull...