My Freepulse headphone won't pair anymore. Both components charge, both both of them display the red LED light. I've tried the override button on the transmitter, and I've tried holding the power button down on the headphones to get it to change channels, but to no avail. They simply won't pair. What should I do? What should I do?

After charging, turn on headset by pushing the power button until the charging led turns red and flashes. continue to hold the button until the light flashes red and green. Go to your phone or device bluetooth settings page and search for devices, it should show up as TPRO HP500BT. Select device and select to Pair with this device. The light should start flashing red really fast, then it should be paired!

Have you tried doing the same with the headphones? If you hold the power button down on both the transmitter and heaphones (get them both flashing red and blue), they might pair.

Try un-pairing it from any other device and turn off bluetooth on any mobilefone in bletooth range. Then start discovery on ipod again.

You might find a replacement dongle on ebay.

Yeah, they were quite well together i have them both.
To connect

1. Hold the switch button on the Free pulse until it flashes
RED & BLUE

2. Go to bluetooth setting in the T10 and add Headphones

3. Turn on headphones when turning on T10 should automaticaly connect.

There is a reset button on both the headphone and the transmitter. Try to reset them both before attempting to pair them again. Since the led won't turn on there is a possibility that the battery is not charging. Is the orange light working when the headphones are charging? It should be and then it should turn off when the battery is full.

Visit the Logitech support website and find the instructions to reset and pair them. Since yours is for an Ipod I'm assuming you have the older white/grey model and not the freepulse headphones. The procedure is not the same. From memory the procedure it to reset both (look for the small hole to insert a paperclip). Once both are reset begin with the transmitter. Hold the power button down for about 30 seconds until the light flashes red and blue. When it does do the same for the button of the headphone until it flashes red and blue. When both are flashing red and blue they should pair together and the lights should turn solid blue..

Quote from LOGITECH official site:
In rare cases, the FreePulse Headphones may loose synchronization with the receiver. If this occurs the following steps will re-establish the connection by putting both the headphones and the receiver in discoverable mode (actively searching for another bluetooth device it can connect to).  
Putting the headphones in discoverable mode:
Press and hold the power button (located next to the charging port on the right earpiece) on the headphones. The LED on the button will go through three states in this order:

• Blinking Red
• Off (continue to hold. the LED will be off for several seconds)
• Alternately blinking red and blue. (The headphones are now in discoverable mode and you can release the button at this point. The headphones will remain in this state for 30 seconds).

Putting the receiver in discoverable mode:
Press and hold the power button (located on the side of the receiver opposite the headphone jack).The LED on the button will go through three states in this order:

• Blinking Red
• Off (continue to hold. the LED will be off for several seconds)
• Alternately blinking red and blue. (The reciever is now in discoverable mode and you can release the button at this point. The reciever will remain in this state for 30 seconds).

Re-establishing the connection:
To re-establish the connection between the headphones and the reciever, put the headphones and the receiver in discoverable mode at the same time. It will take a few seconds for the two devices to establish the connection. Once the connection has been established the LEDs on both the headphones and receiver will glow solid blue.

Do this and Freepulse will be pleased.

The following procedure will re-establish the communication link between the Headphones and the Wireless adapter, this is called "pairing". Before you start please make sure both the headphones and the wireless adapter are fully charged and turned off.
Note: The headphones and the wireless adapter come pre-paired from the factory.
1. Press and hold the power button on the headphones. See Figure 1.

Figure 1

2. Continue to hold the button down until the LED starts flashing red/blue in an alternating pattern. Release the button when the LED starts flashing red/blue. See Figure 2.

Figure 2
3. Once the headphones LED is flashing red/blue, press and hold the power button on the wireless adapter. See Figure 3.

Figure 3
4. Hold down the button until the LED starts flashing red/blue in an alternating patter. The LED will blink blue, then turn off for a few seconds then blink red/blue. Release the button when the LED starts flashing red/blue. See Figure 4.

Figure 4
5. Once both the headphones LED and the adapter LED is blinking red/blue, press the volume up button once on the headphones. See Figure 5.

Figure 5
Once the headphones is paired with the adapter, the LED on the headphones will blink blue once every two seconds. See Figure 6.

Figure 6
When the adapter is paired the LED will be solid blue. See Figure 7.

Figure 7
The adapter may continue to blink red/blue for a few seconds even after the headphones LED starting blinking blue. This is normal; the adapter may take a few additional seconds before the LED turn solid blue.
Once the headphones and the adapter are paired, it is not necessary to pair them again even if the batteries on both units are completely drained.
Additional Note: Repeated pairing will not improve the sound quality or give the headphones and the adapter a cleaner connection.

Thank you SO much , i know this is old, but i recently had mine repaired and i thought i'd have to do it again but you saved me a weeks worth of stress, and renewed my faith in logitech, as if i EVER doubted them <3333