The Portable Ultrasonic Wave Sonar Sensor Fish Finder is like a sharp eye that works underwater. Simply turn on the finder and toss the floating sensor to instantly reveal water depth, fish location and sea bottom readings in your palm. Or you can mount the sensor to the boat to get results. Ultra wide 45-degree sonar detection angle ensures its high performance. LCD screen with green backlit offers a clear view. Plus, it provides sensitivity adjustment for added convenience. Click and order right now!