LUCKY fish finder can help you search less time and catch more fish. So enjoy your fishing time with LUCKY fish finder!<br><br><b>Specification</b><br>1) Display: 2.8 inch LCD with 3 color tone:Blue, Orange, and Gray, pixels:240V x 320H <br>2) Back lighting: On/off White LED<br> 3) Depth Capability: 147feet(45m) <br>4) Sonar Coverage: 90 degrees beam angle in 125Khz <br>5) Wireless operational Range: 328feet(100m)<br>6) Power: 3.7V rechargeable lithium battery<br> 7) Floating& Waterproof design <br>8) Wireless Sensor battery reauirement: one replaceable CR2032 battery<br>9) Water depth,water temperature, fish location, bottom contour can be constantly obtained from the water <br>10) User selectable sensitivity,zoom,units,depth range,shallow alarm,fish icon,fish alarm,and chart speed setting <br>11) Built in memory stores sonar setting when the fish finder is turned off <br>12) Wireless Sensor could shut down when it is out of the water<br> 13) Operational Temperature: 14°F to 122°F(-10°C to 50°C) <br><br><b>Package list:</b><br>1) Monitor x 1 <br>2) Wireless sensor x 1<br>3) Manual x 1<br>4) USB cable x 1<br><b>how to use it</b><br>Tie the fishing line to the hole of Wireless sensor and cast it to the water. <br>Attach the adapter to the boat with tabs<br>Neck strap x 1<br><br>Kindly note: the item don't contain the plug.