A clip-on board essentially consists of the following components: Openable Aluminum profile: Less than half an inch thick, this aluminum profile holds the print. LEDs on the Edges: Embedded on its edges of the aluminum profile are small LEDs which light up the print from behind.
Sandwich Board/Frame is made of two sheets of clear acrylic. The actual communication/poster to be displayed is placed between these two sheets. Since the sheets are made of clear acrylic, it gives a great glass-like look, minus the weight or handling hassles of glass.