This is a 16GB UHS-I microSD card pre-installed with latest Raspberry Pi Linux distribution "Raspbian". Since this is a UHS-I microSD it is capable of transferring data at speeds up to 96MB/s allowing it to have a noticeable increase in performance while running an on-board OS.
We test and verifie each card before shipment.
Raspbian is a free operating system based on Debian optimized for the Raspberry Pi hardware. An operating system is the set of basic programs and utilities that make your Raspberry Pi run. However, Raspbian provides more than a pure OS: it comes with over 35,000 packages, pre-compiled software bundled in a nice format for easy installation on your Raspberry Pi.
OS Installed: Raspberry Pi OS (32-bit) with desktop and recommended software, version May 7th 2021(Kernel version: 5.10).