Message Board size: 543*75mm High quality LED message board installed on the rear of lightbar Stand flashing display for a word less than 10 letters Scrolling display for a word over than 10 letters Moving display of directional arrow from left side to right side, or from right side to left sides, or from center to both sides Mini keyboards and LCD screen for easy operation The color of LED clusters on the front of lightbar is optional Technical Standard MODEL LTF2-5000 MESSAGE LED Lightbar VOLTAGE DC.12V, DC.24V NET WET 16KG SIZE 1180*314*117(165)MM