When pairing with a BLUETOOTH device that cannot display a list of detected devices or that has no display, you may pair the device by setting both the headset and the BLUETOOTH device to pairing mode. At this time, if passkey is set other than “0000” on the BLUETOOTH device, pairing cannot be done with the headset. Bluetooth pairing is similar. When two Bluetooth devices are pairing, they exchange information. They establish a connection and recognise each other in the future without any introduction - unless one device forgets the other one or vice versa. When you listen to music from a computer on the headset, sound quality may be poor for the first few seconds after a connection is made. This is caused by the computer transmitting music at sound quality for communications at first, and it is not a malfunction. The Bluetooth profile of a device determines what Bluetooth devices it can communicate with and how this communication is done. Take these two examples:

NOTE: If the device name is not displayed in the Bluetooth items, there is a possibility that the Bluetooth function is set to off. Set the Bluetooth function to on. Noise or sound skips may occur depending on the BLUETOOTH device connected with this unit, the communication environment or the usage environment. When you meet a new person, you usually introduce yourself first and exchange basic information. You won’t have to do this again the next time you meet your new acquaintance - unless you forget who they are or vice versa. NOTE: This process can take up to 15minutes. Do not turn off or restart your computer during this process.To be able to use the BLUETOOTH function, the BLUETOOTH device to be connected requires the same profile as this unit. Note also that even if the same profile exists, devices may vary in function depending on their specifications. Hold it close to the NFC logo (e.g. left headphone cup on WH-1000XM4). You don't even have to power on your headphones. They will turn on automatically. If the pairing information was deleted by initializing the headset, etc., delete from your iPhone the pairing information for the headset, and then pair them again. Type your search word (e.g. ‘Bluetooth pairing’) in the search bar in the top left-hand corner, as shown in the screenshot below.

I'm struggling to connect two Bluetooth devices for the first time or pair a second device. Linking two devices for the first time is called Bluetooth Pairing and is often activated automatically when you're using your product for the first time. We refer to pairing to a subsequent device as 'second-time pairing'. Please continue reading the article below. Listening with this headset at high volume may affect your hearing. For traffic safety, do not use this headset while driving or cycling.If the headset is not used for a long time, the indicator (red) may not light up when you connect the micro-USB cable to charge the headset. In this case, do not disconnect the micro-USB cable from the headset: wait a few minutes until the indicator (red) lights up. I can’t pair devices: make sure the Bluetooth profiles of your devices match What is a Bluetooth profile? Do not put weight or pressure on this headset as it may cause the headset to deform during long storage.

For more information, visit the article: What’s the easiest way to pair my Bluetooth headphones with an Android phone? Use the supplied micro-USB cable only, and connect directly to a computer. Charging will not be completed properly by an indirect connection, such as via a USB hub. Tap Disconnect to disconnect your device but keep its pairing information, or Forget to delete its pairing information.

Step 2. Operate a device and complete the pairing

If you have any questions or problems concerning this headset that are not covered in this manual, please consult your nearest Sony dealer. Some devices (e.g. the WH-1000XM4 headphones) can simultaneously connect to two Bluetooth devices. This is called a ‘multipoint connection’. For more information, visit the article: Connect the WH-1000XM4 headphones to two devices (multipoint connection).

Press the Windows Key on the computer and type " add bluetooth device". On the right hand side, select the Settings category. NOTE: For how to enter the pairing mode onyour Bluetooth device, refer to the manual supplied with the product. Tap on the gear icon next to the device you wish to Disconnect or Remove (forget its pairing information). NOTE: For how to enter the pairing mode onyour Bluetooth device, refer to the manual supplied with your product. Set the Bluetooth settings on your Android device to ON and delete the device information of the headphones or speaker.If your Xperia is currently connected to a Bluetooth device, the connected device will appear under ' Available Media Devices', as shown in the screenshot below. Due to the characteristic of BLUETOOTH wireless technology, the sound played on this unit is slightly delayed from the sound played on the BLUETOOTH device during talking on the telephone or listening to the music. However, according to your headphones / speakers setup, you might not hear sound coming from the headphones/ speakersyet. If that's the case, go through the following additional steps below to set them as the default speakers. Turn off the headphones or speaker, and then wait a moment while pressing and holding the power button. A device featuring the BLUETOOTH function is required to conform to the BLUETOOTH standard specified by Bluetooth SIG, Inc. and be authenticated. Even if the connected device conforms to the above mentioned BLUETOOTH standard, some devices may not be connected or work correctly, depending on the features or specifications of the device.