What's Included? Please select item in drop-down menu. Only selected earbud or charging case will be shipped. Firmware version latest as of 6/30/2025. Version 5.0.2. Please match firmware version to sync correctly. Firmware version can be found using the Sony App. Your current earbud (left or right) must be connected and out of the case. There are 3 dots at the top right of the App, tap on it, you will get the menu option for the version. Details Condition: Grade A - Excellent Condition, minor cosmetic blemish if any. Functions like new with excellent battery life. Ready to pair with your set. Earbuds come with new standard size ear tip. 100% Genuine Sony. We carefully inspect test all units and have 10+ years of experience. Sourced from major authorized retailers in the U.S. All serial numbers are checked recorded to verify authenticity. Fast Free Shipping In The U.S. (Same-day shipping M-F until 1PM EST) Initializing instructions: https://www.sony.com/electronics/support/articles/00298373 Initializing video: https://www.youtube.com/watch?v=5Ksn4LiuswQ