LED 16 segment Display Size: 0.5inch, 1inch, 2.3inch Color: red, green, yellow, blue... indoor ... ) LED alphanumeric displays for indoor, application;2) Digit height: 0.5" 1.0" 2.3";3) Single digit, with black or grey surface ... ),pure green(525nm),yellow(590nm),blue(430nm), pure blue(470nm);5) Advantages: long life, low voltage, energy saving, even luminance, good ...