Is that sonar sensor? A great addition to the szcz seeker?? squirrel fish. Functions: Wireless sonar sensor for fish detection LUCKY. Range g?? sideways? ci 45m. 90 degree, cz? hundred?? sonar 125 kHz. Durable plastic construction with watertights? cover? and sealing ring. Works on a replaceable CR2032 battery. Special holes allow? Attaching to it?? to, ? atwe to cast. D stands for G?? side ?? , D T refers to si? to G?? bi and Temeratura. D-transducer for finding basic fish: FFW1108-1, FFCW1108-1 The D T transducer is designed for most users. ci LUCKY fish detection cameras such as FFW718, FF518. Technical data: Matter? : plastic Model: D/D T (Optional) Range g?? sideways? ci : 45m / 147ft Radius angle: 90° Cz ? hundred?? sonar: 125 kHz Dimension: 7,8 * 5,5 cm / 3,1 * 2,2 in Weight: 45g / 1.6oz List of packages: 1 * Sonar Sensor for Lucky Fish Finder Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia