Garmin GT20-TM

Match the pin count on the sonar port of your sounder

Transom Mount: These are attached to the back (transom) of a boat hull. Alternatively, use the included equipment to install on a trolling motor.In-hull: An in-hull transducer is installed inside a boat hull against the bottom

77/200 kHz sonar transmits a single ping at either 77 or 200 kHz50/200 kHz sonar transmits a single ping at either 50 or 200 kHzHigh-wide CHIRP has a frequncy range of 150-240 kHz in each transmission

260/455 kHz ClearVü is ideal for deeper water, 1000\' Max Depth scanning sonar455/800 kHz is the most flexible scanning sonar up to 500\' max depthUltra-High Definition 800 kHz ClearVü is ideal for 200\' Max depth Scanning sonar