Garmin STRIKER Plus 4 w/ Dual Beam Transducer Fish Finder - The Striker Plus 4 Fish Finder with a bright 4.3in display and built-in GPS features Chirp sonar for crystal-clear images and Quickdraw Contours map drawing software. The built-in GPS lets you mark and navigate to waypoints and shows your boat’s speed. Nobody knows the waters you fish better than you and your fellow fishermen. While you are trolling the shorelines and the depths, Quickdraw Contours mapping software creates HD fishing maps of the places you’ve been. No special knowledge is required. Striker Plus 4 can now store up to 2 million acres of your Quickdraw Contours maps with 1ft contours. The Striker Plus 4 Fish Finder includes Garmin Chirp technology for a higher level of clarity and detail that you have come to expect from Garmin. Crystal-clear sonar images provide remarkable target separation and resolution in shallow and deeper water. Bottom contours are more visible, even at higher speeds, and signal noise can be suppressed at greater depths for a timely interpretation of what’s below. The built-in, high-sensitivity GPS finds and maintains your position anywhere you go on the water. The GPS allows you to mark waypoints for different locations. So, if the fish are biting in 1 spot, you can mark it, and return to it on your next trip. Mark docks, boat ramps and other locations on the lake, and create routes back to them for your next trip. GPS also allows Striker Plus 4 to show your speed on screen, so you can be sure you’re trolling at the right speed for the lure you’re using or in wake-controlled areas. The Striker Plus 4 makes fishing a breeze, and it’s built to work in any environment. The bright, sunlight-readable display gives you a clear view of what is below your boat, even on the brightest days. And the larger screen gives you a better view of what is happening below the boat. The intuitive user interface makes it simple to navigate to whatever features you need, so you are ready for anything on the water. Physical dimensions: 3.9x6.9x1.8in Weight: 0.7lb Fish Symbol ID (helps identify fish targets) Water temperature log and graph Audible alarms AutoGain Technology (minimizes clutter, maximizes targets) Dual-beam (77/200 kHz) sonar capable Water temperature sensor included Split-screen zoom A-scope (real time display of fish passing through transducer beam) Adjustable depth line (measures depth of underwater objects) Dual-frequency (50/200 kHz) sonar capable Bottom lock (shows return from the bottom up) Ultrascroll (displays fish targets at higher boat speeds) Voltage range: 10-20 Vdc input Quickdraw Contours Mark Waypoints Integrated GPS Course over Ground Current draw @ 12V: 0.23A Included in the Box: Striker Plus 4 Fish Finder Garmin dual beam transducer with 20ft cable Power/data cable Tilt/swivel mount Hardware Documentation