Using this 20mm yellow 7 - segment display is easy. First, connect it according to the common - cathode configuration. Make sure the forward voltage doesn't exceed 1.9VDC and the current stays below 20mA to avoid damaging the LEDs. When installing, find an appropriate enclosure considering its dimensions of 71.6 x 25.7mm. As for maintenance, keep it clean and dry. If you need more detailed info, refer to the datasheet.