Main Features:Detect and display grass, weed, sand, and rock on seabedGet the approximate location of fish and the depth of waterRound transducer sensor with 7.5m cable, 45 degrees beam angleWith fish depth scale and audible fish alarmUser selectable meter or feet readingRange of depth readout from 0.7 meters up to 100 metersDisplay bottom rock or grassRemovable floatSpecifications:Display: TN / ANTI-UV LCD with LED back lightingDepth range: 0.7m to 100m ( 2ft to 328ft )Sensor beam angle: 45 degreesOperating temperature: -20 to 70 ( -4F to 158F )Powered by: 4 x AAA batteries ( not included )