Item description for Sony WF-1000XM5 Replacement LEFT Side EarBud Black FIRMWARE 4.0.2 ONLY!!!!!!

Authentic - Open box - Replacement Part - NOT A COMPLETE SET - You will receive a single LEFT side replacement. One original foam ear tip will be included.

Thoroughly tested and guaranteed to operate as intended by the manufacturer. All replacement parts come with the latest update.

***This replacement earbud has been updated to FIRMWARE 4.0.2 and will ONLY sync with a right side that has the same FIRMWARE. PLEASE LET US KNOW IF YOU NEED ASSISTANCE BEFORE YOU PURCHASE OUR EARBUD.*****

Initializing instructions: https://www.sony.com/electronics/support/articles/00298373

Initializing video: https://www.youtube.com/watch?v=5Ksn4LiuswQ