<p><b>This is a castable and rechargeable fish finder with clear color screen for avid fisherman. It is suitable for fishing from a kayak or boat, casting from the shore or using for ice fishing. You will be able to learn the depth, temperature and bottom contour of water that don't have topographical maps and find where the fish are in the them.</b></p> <p><b>Feature:</b> <br>1. Easy to use: tether the sensor with fishing line and cast it onto water. <br>2. Displays water depth, water temperature, fish size (small/middle/big), fish depth, and bottom contour <br>3. Auto & Manual depth range selection <br>4. 20-level Sensitivity (high detection accuracy) <br>5. 10-level chart speed <br>6. 10-level backlight brightness. <br>7. Measure units of depth and temperature displayed in either FT/°F or M/°C . <br>8. Mode Set: Work and Simulation Mode</p> <p><b>Specification:</b> <br><b>1. Display</b> <br>Display: TFT LCD <br>Display Size: 52x39mm <br>Display Dot Number : 320*240 <br>Backlight: White LED Backlight <br><b>2. Sonar</b> <br>Depth Range: 2.6-118FT/0.8-36M <br>Sonar Beam Angle: 90 degree <br>Operational Temperature: -20 ~70℃ <br><b>3. Power Supply:</b> <br>Mainframe : Lithium battery 4*AAA alkaline battery (not included )<br>Transducer: built in polymer lithium battery 3.7V<br>Comes with USB Charging Cable </p><p><b>Package includes:</b> <br>1. Handheld display <br>2. Sonar sensor <br>3. User Manual <br>4. USB charging cables for sonar sensor <br>5. Neck strap</p> <p><b>Attention/Tips:</b> <br>1. Its reading might be interfered by other high power sonar fish finder close to your fish finder. <br> 2. Please prevent the sensor from crashing into rocks or other hard items.<br> 3. Strong waves, suspended matter and muddy water, might affect its performance. <br>4. Oil, dirt would adhere to the surface of the sensor and will affect the sonar sensor's performance. Please make sure the surface of the sensor is clean.</p>