LED displays have two main types: led numeric display and led alphanumeric display. LED numeric display is called led 7 segments display, too. 7 segments displays are applied widely to electrical appliances. It can be used in instruments and meters. LED numeric displays show Arabic numerals. LED numeric display show information related to numbers: temperature, time, speed and so on. LED alphanumeric displays can show both letters in alphabet and Arabic numerals. LED alpha-numeric displays are widely used in instruments and meters too. But LED alpha numeric displays are used less than led numeric displays. Part No. title of led display is NFD which means Ningbo Flying Display.