Single color, two-color and full color variable traffic signs. Each sign has the possibility to show different pictograms. Have a micro controller with a number of pictograms in memory. New pictograms (bitmap) can be uploaded. Control over communication channels, digital inputs or self-controlled. LED failure control. Automatic brightness control. Power supply voltage 100-240 VAC. Communication: RS232, RS485, Ethernet, Wireless or GPRS.