Features: Wireless sonar sensor for LU CKY fish finders.45m depth range.90-degree beam angle, 125KHz sonar frequency.Durable plastic construction with watertight seal cover and seal ring.Runs on a replaceable CR2032 battery.(not include)Special holes allow you to tie your fishing lie onto it, easy to cast.Specifications: Model: FFW1108-1Depth Range: 45m / 147ftBeam Angle: 90Sonar Frequency: 125KHzNote: D refers to Depth, D+T refers to Depth and Temerature.D ducer is for basic fish finders: FFW1108-1, FFCW1108-1D+T ducer is for most of the LU CKY fish finders, such as FFW718, FF518.Material: plasticcolour: yellowPackage Contents: 1 x fish finder SonarOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.