To turn on and connect two Umpire (V6) radios:
Start with both V6 units turned off. (Press the RESET button to turn off)
On both units simultaneously, press and hold the INTERPHONE button until the LED flashes red and blue continuously. Release the INTERPHONE buttons when you see both units flashing red and blue.
On the first unit, press the INTERPHONE button. The LED will flash blue as it seeks to pair with the other. Wait for 5-10 seconds, after which time the LED on the other unit should also start to flash blue.
Press the INTERPHONE button again on the first unit to set the communication channel between the two units.
Adjust the volume (+/-) as necessary
When finished, turn off the units by pressing the RESET/OFF button