Ease of use: The main body design of the color screen fish finder is simple and easy to use. You can easily accomplish the desired set of functions. Using the operation demonstration function, you can quickly become familiar with the operation. Support Chinese, English and Russian. This amazing product is designed for amateur and professional fishermen to find out the fish's position, depth and bottom profile. The device can be used in oceans, rivers or lakes and is ideal for detecting fish in a specific area. There is no need to drill holes in the body to mount the sensor, or long wire harnesses to connect the device and the sensor. It is suitable for lakes, rivers, oceans and other fishing environments. Perfect for trolling from a kayak or boat, throwing from shore, or ice fishing. NOTE: If you drop the sensor on the water, wait a few seconds for the sensor to update its data. Once the sensor is placed in the water, it turns on automatically. Allow to dry when not in use. The sensor continues to work. This is an amazing product. It was specially developed for amateur and professional fishermen. The aim is to find out the position, depth and bottom profile of the fish. New and improved color screen and wireless signal transmission design significantly improves ease of use and intuitive data display. Display size: 3.41 inches Display resolution: 240*320 Backlight: Bright LED backlight Depth range: 0.8-36 m. Working range: 100 m (up to 200 m under optimal conditions) Beam angle: 105 degrees Low alarm