With this fish finder, you can easily obtain information about the depth and condition of the sea, scale of fish depth and size of fish distinguish, water temperature, fish and alarm depth, etc.Features:This device is equipped with a sonar frequency system with LCD screen for powerful performance up to 120 feet.Audible fish and depth alarm, depth from 2ft to 120ft.Compact, lightweight and portable to fit in your pocket well.Can be used for boat fishing, platform fishing, long-distance fishing and ice fishing.100m or 328ft wire-less operating , 45m or 147ft depth capability.90 degrees beam angle in 125Khz (Wire-less).Wire-less, no more long heavy cable for transducer.Specifications:Batterys: 4xAAA batterys (not included)Powers: 0.1WDepth : 2-120FtWire-less Operating : 100mSonar Frequency: 125KHZSonar Beam Angle: 90 degreeRadio Frequency: 433.92 MHzOperation Temperature: -20-and70CItem Size: 125x72x30mm or 4.92x2.83x1.18inItem Weight: 205g or 7.23ozPackage Size: 250x110x80mm or 9.84x4.33x3.15inPackage Weight: 350g or 14.11ozPackage List:1xFish Finder1xTransducer1xAntenna1xUSB Chargings Cable1xStrap1xEnglish Manual