Using this blue 7 - segment LED display is easy. First, connect it according to the common anode design. If you're using it with the 74HC595 Shift Register and Arduino, follow the provided tutorial. When it comes to the decimal points, remember only the right one is wired, so use it for your display needs. For maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If you notice any issues, refer back to the tutorial or contact support.