Press the 'A' button for 10 seconds until the display screen turns on.
Set the training level to '2'
Hold down the '2' button on the transmitter.
Continue to press the '2' button while turning on the new receiver collar (Collar 2) by aligning the receiver next to the transmitter at the alignment marks.
Continue to hold Collar 2 next to the transmitter at the alignment marks. You will hear a series of beeps.
When the beeps stop, move the receiver away from the transmitter. Collar 2 is now programmed.