Calling all boaters with Humminbird units! This is the XP-6-20-TP, a thru-hull style transducer. That means it's designed to be installed inside your boat's hull (usually epoxied in place), rather than hanging off the transom. It's a single beam transducer with a 20-degree cone angle, and it has a built-in temperature sensor, which is super helpful for finding fish. It connects to your compatible Humminbird fish finder/chartplotter using a standard 7-pin male connector. This is a genuine Humminbird part (UPC: 082324500916). It's a great replacement if your old one got damaged, or an upgrade if you're adding temp sensing. Important notes: This is just the transducer itself. You'll typically need epoxy or sealant for installation, and the mounting hardware/instructions may not be included (double-check the listing). Also, make absolutely sure your specific Humminbird model is compatible with this 7-pin, thru-hull, 20° beam transducer before you buy. A proper working transducer is critical for getting clear bottom readings and fish arches on your screen.