... 3) High brightness 4)Good after-sale service Led Moving Sign Display Communication: RS232/RS485 com port, PC-USB port ... LED Moving SignDetailed Product DescriptionLED Signs 1.Pixels: 4.75mm, 7.62mm, 10mm, 15.24mm, 20mm ect. 2.Display Color: Monochrome tri-color ... 8mm, 10mm, 15.24mm, 20mm, P22mm ect. 2. Display Color: Monochrome or tri-color 3. Led color: Red, Amber, Blue, Red ect. 4. Communication: ...