Using this 4 - digit red 7 - segment display is easy. First, connect it to your circuit through the sixteen through - hole pins. Make sure to supply the correct forward voltage of 2.1VDC and don't exceed the maximum forward current of 20mA to avoid damaging the LEDs. You can control each digit's decimal point, as well as the apostrophe and colon points, to display different information. When you're done using it, store it in a dry and cool place. If you need to clean it, use a soft, dry cloth. Refer to the datasheet and display example code for more detailed connection and programming instructions.