Humminbird XPT 9 20 T Portable Transducer<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Hydrodynamic</li><li>Single or dual beam (depending on which fish finder used)</li><li>24°/53°</li><li>200/83kHz</li><li>Built-in temperature</li><li>Mounts on the transom or side of most smooth surface wood， aluminum or fiberglass boats</li><li>Single- or dual-beam， utilizes 24- and 53-degree cone-angle beams with 200- and 83 kHz operating frequencies</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41gbumEfboL.jpg" noproxy>