Humminbird 4086901  958C HD Combo DualBeam Fishfinder and GPS with Ethernet (Discontinued by Manufacturer) Depth: 1500 ft, (3000 ft with optional 50 kHz transducer for extreme deepwater use) Mounting: Gimbal or In-dash DualBeam PLUS SONAR with SwitchFire Precision GPS and built-in ContourXD Dual SD Card Slots 7" Display With Ccfl Backlight * 480 X 800 Pixels * Switch fire Down looking Sonar * Chartplotting With Lake Master and Navionics Platinum Compatibility * Dual beam Plus Sonar