I am selling the built-in card reader SEMA SFD321F/T81UEJR. I am selling it because I have purchased a new tower PC. I was using it in my previous PC (a tower PC that was updated from Windows 7 to 10). It's a USB 3.0 equipped 3.5-inch bay card reader with a convenient on/off switch. The following is from the HP website: USB 3.0 compatible 3.5-inch bay internal card reader/writer Convenient USB 3.0/eSATA front port equipped UHS-I transfer mode support, achieving a maximum transfer speed of 104MB/s UDMA mode 6 support, achieving a maximum transfer speed of 133.3MB/s Equipped with an ON/OFF switch, convenient for hiding the drive All slots support card insertion, simultaneous recognition, reading, and writing Achieves USB bus power operation, eliminating the need for a power cable Fully compatible with the latest Microsoft OS Windows 10 Please check the photos for the condition. However, please understand that this is a used item stored by an amateur. Thank you.