A seven-segment LED display is a form of an electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays. Here is a collection of products from 7 segments LED Display to have 0.56″ Red LED module. Seven-segment displays are widely used in digital clocks, electronic meters, basic calculators, and other electronic devices that display numerical information. Each one of the seven LEDs in the display is given a positional segment with one of its connection pins being brought straight out of the rectangular plastic package.