How to connect Bose headphones & speakers to Avantree transmitters and dongles? – Avantree Support

Before pairing, please note that Bose products currently do NOT support aptX-Low Latency codec, hence there will be lip-sync delays when used to watch TV/Video. You may utilize an aptX-LL Bluetooth receiver to eliminate this issue.

Step 1: Get your Bose 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 Bose's most popular products.

Bose QuietComfort 35 (QC35): With the headphone ON, slide the power switch to the Bluetooth symbol and hold it there until you hear “Ready to connect” or the Bluetooth indicator blinks Blue.
Bose 700: With the headphone ON, press & hold the power button for 3 seconds to put the headphones into pairing mode. You'll hear "ready to connect another device" and the Bluetooth indicator will slowly pulse BLUE.
Bose QuietControl 30: With the headphone ON, press & hold the Power/Bluetooth button until you hear “Ready to pair” or you see the Bluetooth indicator blinking BLUE.
Bose SoundLink Revolve (+): With the speaker turned ON, press & hold the Bluetooth button until the Bluetooth indicator blinks BLUE, and you hear, “Ready to connect another device.”
Bose SoundLink Mini (II): With the speaker turned ON, press & hold the Bluetooth button until the Bluetooth indicator blinks BLUE and you hear, “Ready to pair another device.”
Bose SoundLink Color (II): With the speaker turned ON, press & briefly hold the Bluetooth button until the Bluetooth light starts flashing BLUE slowly.

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.

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.
How to Factory Reset BOSE Headphones & Speakers