Humminbird Lakemaster VX West States microSD Features: a VX Technology - Provides exceptional map performance and customizable color palettes. a SmartStrike - Highlights areas of the lake map where fish are most likely biting. (*Select HD Lakes Only) a Chart Presets - Simple and easy to change between your own custom view settings. a Shallow Water Highlight - Easy-to-see red shading highlights shallow water areas on an adjustable range from 0 to 60 feet. a Water Level Offset - Synchronize the depth contours and shorelines of your LakeMaster charts with the actual water levels of lakes, reservoirs and rivers. a One-Boat Network - Connects your Humminbird LakeMaster chart and Minn Kota trolling motor, allowing your boat to automatically follow a depth contour line.