Please be aware that the headphones version is 2.0.0. Please check the version before you place an order for the left or right headphones.

Please contacts us if you need the headphones with other firmware versions.  

We suggest you upgrade to the latest version 2.0.0

Firmware Update to Version 2.0.0

https://www.sony.com/electronics/support/software/00289102

Initializing the headset to restore factory settings

https://helpguide.sony.net/mdr/wf1000xm4/v1/en/contents/TP1000428697.html

The charging case and headsets are not new!! They are used. But they work well. We guarantee they are original.

Please be aware it is not a whole set of headphones-- 3 options:

• 1. XM4 Charging Case, NOT Included Headphones.

• 2. XM4 Left Headphone, NOT Included Charging Case & Right Headphone. Please order it from another link in our store.

• 3. XM4 Right Headphone, NOT Included Charging Case & Left Headphone. Please order it from another link in our store.

• Product Description

  Have lost your original charging case for WF-1000XM4? Want to have an extra backup charging case?
  Our product is a perfect replacement charging case for WF-1000XM4. It is used at 90% or 85% of new.

  Charging case only!! Or 90% of new headset only!!
  
  Note:
  1. Make sure your headset is WF-1000XM4 before purchasing The charging compartment only supports WF-1000XM4 charging.
  2. WF-1000XM4 charger supports wireless charging.

• 
  

  How to check the firmware version