Garmin transmitter GT20-TM TRDX

Transducer in plastic housing with mounting bracket. Can be used with Garmin sounders Striker 4cv, 5cv.

Perfect for shallow water divers who want a traditional and CHIRP ClearVü transducer. This transducer consistently displays clear images of objects, structure and fish passing below your boat. It features a built-in fast-response temperature sensor, 500W of power, 1900 ft (traditional) and 750 ft (ClearVü) depth range, and 77/200 kHz (traditional) and 455 kHz (ClearVü) operating frequencies, 0 to 70 diameters. Follow the instructions carefully to avoid damaging your boat.

The kit includes installation instructions. Follow the instructions carefully.

In the link you can see the differences between the radiators, their possible selection and installation options.
https://www8.garmin.com/marine/PDF/transducer_selection_guide.pdf