features, including a wireless sonar sensor, 5 selectable sensitivity settings adjusted in accordance with the clarity or depth of the water, fish alarm on/off, battery save on/off, battery strength indicator, fish depth indicator, bottom contour indicator, weed indicators, and fish location indicator, and so on, the wireless fish finder is guaranteed to unveil a prize catch. To utilize its value to full, simply attach the wireless sensor to the end of your fishing line and cast it into the water as your normal float or lure from the shoreline, dock bridge, or boat, then the instant depth, fish, weed, bottom contour reading are shown clearly in your palm. Features: Compact, palm-size to fit in a tackle box, a gear bag, or in your pocket. Display: TN/ANTI-UV LCD, 40 * 39mm backlight screen. Depth readout from 2 to 130 feet(0.7-40 meters) in 1/10th precision. Selectable between meter and feet readings. Fish location indicated as the clear fish icon moves in every 5 seconds. Multi-level fish depth indicator. Adjustable low to high5 sensitivity settings. Controllable battery save mode and normal mode. Auto power off delivers extended battery life. Weed, rock, bottom contour detection. 100 meters wireless operating range. Audible fish alarm on/off. Backlit on/off. Battery strength indicator. Water repellent display device. Floating sonar sensor with waterproof gasket. Perfect addition for fishing enthusiasts.