Portable Sonar Sensor Fish Finder Alarm Transducer (Depth to 100m)Highlights... 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 With fish depth scale and audible fish alarm Removable floatProduct Specifications: Display: TN/ANTI-UV LCD with LED back-lighting Depth range: 0.7m to 100m (2ft to 328ft) Sensor Beam Angle: 45 degrees Operating temperature: -20 Deg C to 70 Deg C Powered by: 4 x AAA batteries (NOT included) Selectable between meter or feet readings Can mount the sonar with the following methods A. Fix it to the boat hull B. Use a float on the cable to mount the sonar inside the water C. Fix it on a pole and push it into the desirable position inside the water D. Cut a hole on the ice surface and place the sonar under the water Display the nature or circumstance of bottom of Sea (i.e. grass， rock and sand) Dimension: 12cm x 6.5cm x 3cm Item weight: 173g Package weight: 633g Package size: 26cm x 17.5cm x 6.5cmPackage Details: 1 x Fish Finder 1 x Round Sonar Sensor with 7.5m Cable 1 x Bolt 1 x Wing Nut 1 x Neck Strap 1 x Non-woven bag for fish finder 1 x User Manual