To pair the headphones (single or multiple) of the RS 160 or RS 170 or RS 180 to the transmitter please follow these steps:
Step 1: Start with both the headphones and the transmitter unit off. You should see no lights blinking when the components are off. NOTE: Press and hold the power button for 1 second to turn the components off.
Step 2: Simultaneously press and hold the power button on the transmitter and the power button on the headphones for about 8 seconds until you see rapid blinking of the lights (about twice a second). Once you see rapid blinking you may release both buttons. Wait for the rapid flashing (about twice a second) to slow down to slow flashing (about once every five seconds) which will take about 30 seconds. NOTE: If you are connected to an audio source that is turned on at this point you would hear audio in the headphones.
Step 3: Turn the headphones and transmitter off.
NOTE: If you have a second, third, or fourth set of headphones that you want to link to the same transmitter then repeat steps 1 and 2 and 3 with each pair of headphone doing one pair at a time and turning both the transmitter and headphones off after the pairing process.
If you are plan to use more than one set of headphones on the same transmitter at the same time then you will need to put the transmitter into the "multi mode" before you can hear sound out of all the headphones at the same time. To enter multi mode press the power button on the transmitter to turn it on and then press the power button on the transmitter once more to enter the "multi mode". When the transmitter is first turned on you will notice that the light blinks once every five seconds and after entering multi mode and a second headset is turned on you will notice the power light on the transmitter blinks twice every five (5) seconds to indicate the "multi mode".
Please review this "How To" video (http://www.youtube.com/watch?v=brFXknPUjPc) to see the process in real time.