... /C Radios8. AV Receiver with Diversity inputs9. Small, light weight,four channel,anodized aluminum case Four ... and then connect the 12V DC power adapter--Switch on the power button, LED1,LED2,LED3,LED4 ... connect the antennas, and then apply the power--Switch on the power button--Set RX1,RX2,RX3 ... strongest signal is confirmed. It will automatically switch to the receiver with the strongest signal Package ...