Lowrance's In-Dash Digital Gauges are perfect for both in-shore and inland boaters. The LST 3800 in-dash digital depth and water temperature gauge offers different audible tones for shallow and deep-water (to 700'). This gauge can alert you to dangerous depths or keep you trolling along a contour, leaving your eyes free to check your course or watch the bait. The 3800 features a 200 kHz high-speed Skimmer transom mount transducer with built-in temp sensor. Offers high-contrast dot matrix display with LED backlighting. Perfect in all marine elements, the 3800 is fully sealed and waterproof. Fits standard 2-1/8"diameter hole. One-year warranty.