True Wireless: what to do when you lose your charging case or one of your earbuds

Why can't I purchase a separate charging case?

Both units and charging case require unique connection settings that can only be set at a Sony Authorized Service Center.

When you lost, or have damaged your charging case or earbuds, you can send in the remaining headset unit(s) and/or charging case for repair. 
Because of this unique tag-writing, the charging case and single units of the headset are not sold separately.
 

Authorised Service Center

Please contact Sony Authorised Service Center: once they receive your remaining headset unit(s) and/or charging case, they can replace your missing charging case or earbud and synchronise it with your original product. 

NOTE: The warranty doesn't cover the cost of replacing the missing items.