Marine Electronics
Humminbird HD Side Imaging Dual Beam PLUS Transom Transducer XHS 9 HDSI 180 T, 20/60/180 Degree, 200/83/455/800kHz
Dual/HD Side Imaging Transom 20/60/180 Degree, 200/83/455/800 kHz Built in temperature 20' cable
https://www.bizrate.co.uk/marineelectronics/humminbird-hd-side-imaging-dual-oid4037606996.html