How to connect Sennheiser headphones & speakers to Avantree transmitters and dongles?

Step 1: Get your Sennheiser Headphone / Speaker into Bluetooth Pairing Mode.

Different products tend to have a different-looking pairing mode... but not to worry, see below for the pairing mode for a list of Sennheiser's most popular products.

• Sennheiser HD 4.50 BTNC (and HD 4.40): This product supports aptX codec. To enter pairing mode, make sure that the headphone has been turned OFF. Press & hold the power button for 4 seconds until you see the LED indicator flashing RED & BLUE.
  
• Sennheiser PXC 550 Wireless: Press & hold the EffectMode Control button for 4 seconds or until you hear tones and the voice prompt "pairing". The LED indicators will flash WHITE in sequence.
  
  
• Sennheiser HD1 M2 AEBT: This product supports aptX-HD codec. To enter pairing mode, please make sure that the headphone has been turned OFF. Press & hold the power button until you hear a "pairing" voice prompt. The LED indicator will flash RED & BLUE.
  
  
• Sennheiser Momentum True Wireless: Put the headphones on. Simultaneously touch and hold the right and the left touch control panels for 5 seconds until you hear the voice prompt “Pairing” and a beep.
  
  

Step 2: Put your Avantree Bluetooth transmitter into Pairing Mode as well.

Please refer to its user guide if you're not sure how. With both devices in pairing mode, keep them close to each other and give them a few seconds. Please check their respective LED indicators to make sure that they've connected.Please contact us at support@avantree.com if you have any question.

In case you prefer Learning through Videos:

If no luck to get them paired, please Factory Reset/Clear Pairing history of both devices and try again.