Indoor LED moving message display. Pro Display has been producing LED moving message displays for almost 20 years, designing and developing LED products for both commercial and industrial applications. The product line includes a range of standard displays and custom designed solutions to meet specific customer requirements. Manufacturing single, multi line and full matrix LED message boards with standard character heights from 23mm (1”) to 650mm (25”). Our product range includes single colour, tri colour and full colour displays, including high brightness models for window applications.