venterior vt-ff001 portable fish finder handheld fishfinder fishing gear depth finder with sonar transducer and lcd display venterior <p><b>specification :</b><br> 1. measure units: meters / feet<br> 2. display: lcd display<br> 3. backlighting: led<br> 4. 4.6cm diameter round transducer sensor<br> 5. depth range : max: 100m (328ft) ; min: 0.9m (3ft)<br> 6. sensor beam angle: 45 degrees<br> 7. operating temperature is from -20°c to 70°c (-4°f to 158°f)<br> 8. uses 4 x aaa batteries (not included)</p> <p><b>package included :</b><br> 1. fish finder display<br> 2. sonar sensor (transducer) with 25ft cable<br> 3. removable transducer float with rubber stopper<br> 4. transducer side-scan adapter<br> 5. stainless bolt and wing nut<br> 6. water-resistant bag for display <br>7. neck strap<br> 8. operation manual</p> <p><b>how to use the sonar sensor: </b><br> 1. toss the sensor and float into the water.<br> 2. attach the side-scan adapter to the boat hull using the mounting tabs.<br> 3. attach the sensor to a handle, lower the sensor into the water.</p> <p><b>attention:</b><br> 1. it will turn off automatically if the depth display reads "---" continuously for 5 minutes. <br> 2. it can not be used to detect bait fish or fish that is smaller than 10cm. <br> 3. when use this fish finder on moving boat, please make sure the bottom of the transducer is horizontal and the moving speed is slowly (lower than 5 mph). <br> 3. strong waves, suspended matter and muddy water,will affect the performance.<br>4. its reading might be interfered with other high power sonar fish finder close to your fish finder. please make sure there is no other sonar fish finder cloes to your fish finder.</p>