Take it with you - Humminbird 500 Series 571 DI PT Portable DualBeam PLUS and Down Imaging fishfinder with Side Imaging. This portable system enables you to bring Humminbird innovation anywhere you need it with this soft-sided carrying case that includes a 7ah battery and charger. Thanks to best-in-class HD screen resolution, incredibly clear Down Imaging plus dynamic SwitchFire Sonar, you won"t miss a thing. Timber, rocks, even fish-watch it all take shape on crystal-clear, 5 inch monochrome display. Find your way using built-in UniMap or up the ante with optional LakeMaster and Navionics cartography. Get all this technology in a convenient in-dash mount, or use our Tilt and Swivel Quick Disconnect Mounting System. Versatility makes the 500 Series perfect for a wide range of boats. Portable model adds portable case, suction cup transducer and 12v battery and charger.