... same timeNot affect by 2.4GHz R/C RadiosAV Receiver with Diversity inputsSmall, light weight,four channel,anodized aluminum case Specifications ... and RX2 for F2, RX3 for RF3, RX4 for RF4, with different position of the number 1, 2, 3 names different ... signal is confirmed. It will automatically switch to the receiver with the strongest signal