Mounting Type:thru hull Description:Thru hull ducer, marine ducer Model Number:A-TD25 Type:Fish Finder ducer Usage:Find Fish and Measure Water Depth :Ultrasonic, Ultrasonic Sensor Output:600W Application:Fish Finder ducer Product name:600W 50&200KHz Bronze ducer Frequency:50/200KHz High Sensitivity,Strong Anti-interference Firm and ,High Precision Frequency Good target detail in shallow-water at 200 KHz or / and good deep-water bottom at 50 KHz Bronze or rubber housings available Optional depth+temperature Colour:As Shown Material:Copper +abs Package Contents: 1 * 3Pin ducer 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.