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. If the life of the built-in rechargeable battery drops significantly, the battery should be replaced. Consult your nearest Sony dealer for replacement of the rechargeable battery. However, the second time you pair it, you will have to press and hold the pairing mode button for 7 seconds. The headset can be paired with multiple devices, but can only play music from one paired device at a time.

In this case, delete the pairing information of the headset from the BLUETOOTH device, and then pair them again. 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.Do not put weight or pressure on this headset as it may cause the headset to deform during long storage. Turn off the headphones or speaker, and then wait a moment while pressing and holding the power button. CONFIG_USB CONFIG_USB_ACECAD CONFIG_USB_AIPTEK CONFIG_USB_ATI_REMOTE CONFIG_USB_HID CONFIG_USB_KBD CONFIG_USB_KBTAB CONFIG_USB_MOUSE CONFIG_USB_MTOUCH CONFIG_USB_POWERMATE CONFIG_USB_WACOM CONFIG_USB_XPAD CONFIG_USB_YEALINK

Once BLUETOOTH devices are paired, there is no need to pair them again, except in the following cases: 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. Please note that [LE-WH-1000XM4] no longer appears after upgrading to firmware version 2.0.7 released on 5th November 2020. Using the BLUETOOTH device may not function on mobile phones, depending on radio wave conditions and location where the device is being used. E.g. The WH-1000XM4 wireless Bluetooth headset immediately goes into pairing mode when used for the first time.One-touch connection (NFC) with a smartphone (Android 2.3.3 or later, and less than Android 4.1) [14] Where Sony's MDR-ZX330BT falters in design is that it's, unequivocally, one of the cheapest-feeling mid-range headsets around. That has to do, mostly, with the unpadded plastic bridge that connects the two ear cups and the overall lightness (the headset weighs in at an ultra-light 150g). The above procedure is an example. For details, refer to the operating instructions supplied with your BLUETOOTH device.