... Product name: ali express tricolor high quality led wireless taxi roof signs 1,ali express taxi roof signs2,tricolor high quality taxi ... : Through RS232(free),( you can choose RS485, USB, TCP/IP, Wireless communication )the screen can display text, display images, display time ... size (mm) 200X200Pixel configuration (R,G,B) 2,1,1Pixel matrix per module (dot) 8×8Pixel (dot/s.q.m) 400Viewing distance ...