LeaningTech JL-88 Portable Wired Sonar Smart Fish Finder, with Alarm Capturing Transducer, LCD Display, Yellow & Black With fish depth scale and audible fish alarm; Apply to the pond, river, sea and other fishing environment. Detect and display grass, short & tall weeds, sand, and rocks on seabed. Get the approximate location of fish and the depth of water. Round transducer sensor with 7.5 m cable, 45-degree beam angle. LeaningTech fish finder is designed for amateur and professional. Excellent customer service and technical support. Please feel free to contact us whenever a question pops up in your head, we are always here to help.