... :4000:1 High fresh frequency CE, approved LED display screen Features & Advantages: Built-in intelligence monitors LED color signature ... brightness proportion ratioR: G: B = 30%:60%:10%Color temperature3,500° — 9,500° K( ... 0-99%ServicingFront and back serving optionalControl modeSynchronous & asynchronous availableCommunication optionsWire Ethernet, Fiber Ethernet,RF wireless,GPRSPower120/240 V ...