The Advanced Accessory System PC Connection Kit includes: PC USB port connector, AA Battery Power Cable and detailed instructions. The PC Connection Kit requires: PC USB Port, 8-AA Batteries, HumminbirdPC Software (see the Support section for details.)For use with upgradeable and GPS products without a card reader. Used with your home PC, internet connection and the HumminbirdPC application to access software updates. to enhance performance, download entirely new featues and capablities, store waypoints, routes and other navigational data in your PC Note: Units with a card reader would only need the PC connect kit to personalize the unit. The kit is not needed to update software and manage tracks/waypoints/routes for the units with a card reader.