Here's another accessory for the Apple Vision Pro, and it costs $300. Developer Strap is needed for service centers and developers

But it’s not for sale just like that

This is what the very expensive Apple Vision Pro headset looks like inside. The device has already been disassembled by iFixit specialists

Details about the Apple Vision Pro headset continue to appear on the Internet, which were initially unknown. For example, it turned out that Apple has a special accessory called the Developer Strap, which is needed by developers and service centers. 

This accessory allows you to connect the headset to a PC for troubleshooting and to enter developer mode.  

Apparently, it costs $300 separately, but you can’t just buy it — You must be signed in to a paid US Apple developer account.