Transducer of plastic aft with 6-pin connector, equipped with a temperature sensor. Compatible with Fishfinder 100 Blue, 160 Blue, 240, 240 Blue, 250, 250C, 340C, 400C and GpsMap 420S, 421S, 430S,431S, 440S, 441S, 498, 520S, 521S, 525S, 530S, 531S, 535S, 540S, 541S, 546S, 720S, 740S