Used most commonly as a mobile advertisement for your business warning system for road works ahead (highway use compliant) promotional tool for an event Variable Message Sign (VMS) boards can be used to display information in countless applications. They can display any range of messages composed of letters, symbols and animations in high visibility amber lights. These VMS boards are mobile and can be safely towed behind a large sedan. The VMS units have excellent security features for when they are left unattended.