XPTH 9 HDSI 180 T Transducers.Plastic Thru Hull Transducer
Dual/ High Definition Side Imaging, 20/74/84 Degree, 200/83/455/800 kHz with built in temperature. 30' cable. Transducer dimensions: 5.95"L X 3"W. Shaft diameter: 1.0" Fairing block included.
HB indicates the transducer supports 455 and 800......
HB indicates the 798 does not support 800..
This means you will not have the 800 for deep depths..
Chuck