MeGooDo 100M Portable Wired LCD Display Alarm Transducer Sonar Sensor Fish Finder Round Fishfinder With 7.5m Cable,45 Degree Beam Angle, Removable Float With fish depth scale and audible fish alarm; Apply to the pond, river, sea and other fishing environment Get the approximate location of fish and the depth of water Round transducer sensor with 7.5 m cable, 45-degree beam angle.The transmitter is waterproof, but the receiver (unit with screen) is not Detect and display grass, short & tall weeds, sand, and rocks on seabed Power Saving:It will turn off if depth display reads "--" for 5 minutes