... 3.rs232 control system 4.We can OEM the function Led Digit Sign1, Digit height:8”/10”/12”/16”/18”/20 ... adopts the Leds with Super brightness, wireless data sender and remote controller. Besides,we can OEM the functions of controller according ... to your demand.(Time,Date,Price,Temperature,Digit etc.) Rs232 LED Digit Sign(Gas Price,Time/Date Sign )