Electrical Supplies
Humminbird Dual Beam Transom Transducer XNT 9 DI T, 200/455 kHz + Down-Imaging 455/800 kHz + Temp
Down Imaging/DualBeam Plus 75°/45°, 455/800 kHz (DI) and 25°/16°, 200/455 kHz Built in temperature 20' Cable.
https://www.bizrate.co.uk/electricalsupplies/humminbird-dual-beam-transom-transducer-oid5446985690.html