BlueChart g2 Vision SD cards enhance the preloaded maps on your chartplotter and add a whole new dimension of exceptional features such as: High Resolution Satellite Imagery Aerial Reference Photography Mariner s Eye View Fish Eye View Auto Guidance and Fishing Charts. Includes tides currents marine services coastal roads and points of interest. If your chartplotter is BlueChart g2 Vision compatible all you have to do is select the coverage region you need. Compatible with the following units: (All GPSMAP) 4008 4012 420 420S 4208 4212 430 430S 430SX 430X 440 440S 440SX 440X 450 5008 5012 520 5208 520S 5212 525 525S 530 530S 535 535S 540 540S 545 550 555. MFG# 010-C0710-00 010C071000 UPC# 753759068905