Garmin GT-20TM Transom Or Trolling Motor Mount CHIRP DownV? Transducer, 4-Pin 

this all-in-one DownV? 500W traditional xducer helps you get ultra-clear sonar pictures of objects, structure and fish that pass below your boat. 20' Transducer cable with built-in fast response temperature sensor; depth to 1,900' (traditional) and 750' (DownV?); an operating frequency of 77/200 kHz (traditional) and 455 kHz (DownV?); and a 0° to 70° transom angle. Transducer comes with transom and trolling motor mounts, and installation instructions. Follow the instructions carefully to avoid damaging your boat and proper operation.

Description: GT20-TM (4 pin)