Using this 4 - digit 7 - segment display is easy. First, connect it to your device through the sixteen through - hole pins. Make sure to follow the correct wiring based on the common anode design. When powering it, keep in mind the forward voltage of 2.1VDC and don't exceed the maximum forward current of 20mA to avoid damaging the LEDs. You can use the included example code as a starting point to display the information you need. For maintenance, keep it in a clean and dry environment. If it gets dirty, you can use a soft, dry cloth to gently wipe it. And remember, we have different color options like red, green, and blue if you want a change.