... Features of D58-4 5.8G Four Channel Diversity Receiver:Four channel Receiver for best receptionFour groups frequencies ... timeNot affect by 2.4GHz R/C RadiosAV Receiver with Diversity inputsSmall, light weight,four channel,anodized aluminum case ... work.LED8 is on when no signal.--Select the channel: RX1 for RF1 and RX2 for F2, ... --Set RX1,RX2,RX3,RX4 to the same channel--LED5 for RF1 and LED6 for RF2,LED7 ...