"The All New 2009 LakeMaster® ProMap Iowa/Illinois Card is plug & play, which means you simply insert the chip into your Lowrance unit, turn it on, and the lakes automatically appear on your screen. It's that simple. The new IA/IL chip is loaded with an amazing 478 total lakes with contours, of which 34 are high definition LAKEMASTER PROMAP lakes. Just a few of the highlights include: Shallow Water Areas for all ProMap lakes."