◆ Ice Fishing Design: It is an upgraded model of the most popular portable fish finder. We design an extra housing for the sonar transducer that could make the fish finder have better performance in ice fishing which increased 30% compared to the ordinary one.. Because the sonar sensor could better penetrate ice. | ◆ Various Data Display: By using LUCKY portable fish finder, you could get to know the water depth, fish location and objects on bottom (rocks, seaweeds) in real time. It is possible to fishing either in clear water or in turbid by adjusting the sensitivity of the handheld fish finder. You will never miss fish or fish schools because of the fish alarm function built in the handheld fish finder. | ◆ Casting Performance Improved: The blue housing for the portable fish finder sonar is not only improved performance in ice fishing, it also helps you to cast the sonar transducer further than it used to be. No matter it is shore fishing or kayak fishing, you will have better understanding of the fish distribution in that area. | ◆ Power Saving Mode: The handheld fish finders could continuously working for 4-5 hours in power saving mode. Even more there is a blue backlight enables you to read the data at night. The display is also visible in sunlight. However, the display of the portable fish finder is not waterproof. Please keep it a way from water and rain. | ◆ Professional Detection Design: The range of the depth finder boat is 3ft-328ft and the detection angle is 45 degrees in beam angle. The measurement of the depth could be switched by pressing the "Enter" button of the handheld fish finder for 3-5 seconds until you can see the "M" changing to "FT". The device doesn’t work accurately in small water areas. Please try it wild river or lakes.