This portable fish depth finder is designed to enhance your fishing experience by displaying the approximate location of fish and measuring water depth. With a detection range of 3 ft. (1m) to 328 ft. (100m) when the sonar transducer is fully submerged, it offers precise depth tracking as you move across the water. The sonar transducer can easily be attached to the hull of a kayak or boat to monitor depth changes. In addition to showing fish and water depth, the handheld unit also provides data on underwater features like weeds, sand, and rocks, helping you better understand the environment. You can switch between feet and meters for depth measurements, and the backlit LCD display ensures visibility even in bright sunlight or darkness. The unit is compact and easy to hold with one hand, and a neck strap is included for convenience, allowing you to wear it while on the go. 5-sensitivity levels let you adjust for both clear and murky waters. The fish finder also features alarms that notify you when fish or fish schools are detected. With a fresh battery, it can operate continuously for 4-5 hours, and battery-saving mode extends its usage even further. Ideal for boat fishing, ice fishing, and shore fishing in both freshwater and saltwater, it's a perfect gift for any fishing enthusiast.