Erchang Portable Fish Finder, Underwater Depth Locator with Fish Size,Temperature/Shallow Water Alarm Fishfinder Video Camera Combo with Wired Sonar Sensor Transducer and 3 Inch LCD Display CHRISTMAS DAY's HOT, Detect and display water depth & temperature, approximate fish location, detect fish size, short& tall weeds, sand, and rocks on seabed; super depth detection apply to the pond, river, sea, ice, etc No glare in bright sunlight with 3 inch Dot Matrix LCD screen: get clear visuals under the sun; Intelligent sonar exploration of fish: range, location, size, quantity, water temperature, water depth Round Transducer Sensor with 30 feet cable, removable float; 45-degree beam angle, Depth range from 0.7m to 100m. NOTE: The depth is measured from the sonar sensor, not the float Various Features:5 user selectable sensitivity,battery save mode,backlight mode,fish alarm, Shallow water alarm,Fish Icon(different size),can work in Muddy water Attention:1.It will turn off automatically if the depth display reads "---" continuously for 5 minutes.2.The transmitter is waterproof, but the receiver(unit with LCD screen) is not waterproof