1.Long-lasting endurance, durable design: The depth range is 2-118 feet (0.6-36 meters), with a 125KHz sonar frequency and a 90-degree radiation angle to ensure wide coverage and accurate positioning. Powered by a 3.7V lithium battery, it has a working time of up to 25 hours, meeting your various needs in outdoor activities. 2.Night mode, no light interference: The night mode function designed specifically for night allows you to clearly capture target fish in dark waters without worrying about light problems. This is especially useful for shore fishing, which can effectively reduce the impact of light pollution on fish. 3.Accurate data to help fishing decisions: This portable fish finder can be paired with an app on a mobile device to display key information such as fish location, size, depth, bottom contours, and vegetation in real time. Anglers can get valuable data in just a few minutes to help you catch fish more efficiently. 4.Compatible with multiple devices, fishing anytime, anywhere: Supports download and compatibility design for iOS and Android devices, so you don't have to worry about incompatibility between different devices. Whether you are at home, outdoors or traveling, you can easily use this fish finder for fishing activities.