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: FFW1108-1 Depth Range: 45m / 147ft Beam Angle: 90 Sonar Frequency: 125KHz Note: D refers to Depth, D+T refers to Depth and Temerature. D transducer is for basic fish finders: FFW1108-1, FFCW1108-1 D+T transducer is for most of the LU CKY fish finders, such as FFW718, FF518. Material: plastic colour: yellow Package Contents: 1 x fish finder Sonar Only 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.