Elite 4x chirp, is multi frequency, 83/200/455/800. Elite 5 is 200kHz, with power wires attached. Wsu-hst type. Both have broken necks so need to be glued and taped, or epoxy into bilge to shoot thru the hull. $40 each. Also a dual freq 50/200 kHz larger skimmer from years back. $40. I was using it with a LCX-18c All have brackets for the transom.