Item being sold is a bootable USB flash drive which has been loaded with the necessary installer package of macOS Big Sur 11.7.10.

With this flash drive, you can either use it to upgrade a system you currently have loaded with data (i.e. from Catalina up to Big Sur) or you can use it to perform a fresh, clean install of the OS.

Provided below is the link to Apple's officially supported documentation of Big Sur's minimum hardware specifications:

https://support.apple.com/en-us/103111

The format of the flash drive is USB Type-A and the size of it is 16GB

I do offer faster shipping options than USPS Ground Advantage, but they do require you to pay a shipping fee. If you purchase one of these options, my handling time will be either same-day as the order, or next day, just depends on when the order is placed.

Please reach out to me if you have any further questions regarding this listing. I want you to walk away from this transaction happy and with your equipment in good, working condition.