Marine Mobile Digital Gauges bluetooth low energy display application helps you to choose between different display variants: black gauges style(default) white gauges style black digital display white digital display Also new add ons for selecting measurement units for: GPS speed : km/h(default) or knots fuel consumption : l/h(default) or gal/h temperature: Celsius(default) or Fahrenheit You have enable bluetooth access and GPS speed to use all the features of this application. Known errors: