Garmin 010-10272-00 Transducer 200/50khz With Temp Transom Mount

The Garmin Transom Mount transducer for GSD21 and GSD22 with built-in temperature sensor is perfect for outboard boats under 25'.
Operating Frequency oF 200 and 50 KHZ
Beamwidth oF 10 Degrees at 200 KHZ, 40 Degrees at 50 KHZ.
Transducer Kit comes with monting Hardware & installation instructions.

Compatible with Garmin Models:
GSD20, GSD21, GSD22
GPSMAP 178C/250/250C/GPSMAP 298C/100 Blue/160 Blue/240 Blue

188/188C/320C/498/398/198C/340C/250/250C/238/235
400c/440S/441S/430S/431S
540S/530S/541S/531S/545S/535S/546S/536S

Garmin PN #010-10272-00.