Using this 20mm green 7 - segment display is easy. Just connect it to your circuit according to the datasheet. Make sure the power supply matches the forward voltage of 2.3VDC and doesn't exceed the max forward current of 30mA. When installing, find an enclosure that can fit the 71.6 x 25.7mm dimensions. For maintenance, keep it away from excessive heat and moisture. If you notice any flickering, check the connections first. Regularly refer to the datasheet for any technical support.