Lenovo Think Centre M820z 21.5 Core i 5 9th Gen 8GB RAM 256GB SSD Win 10 Pro AIO Desktop PC. Compact design robust performance The 21.5 Think Centre M820z AIO is built for productivity. This mainstream enterprise all-in-one packs the latest Intel® Core™ processors & plenty of DDR4 memory for handling intensive tasks. Its strong security features MIL-SPEC-tested reliability & easy manageability make it ideal for any business environment Unmatched productivity With its PCIe SSD powered by 3D NAND technology & Intel® Optane™ Memory the M820z promises responsive computing & seamless multitasking. & its USB (Universal Serial Bus) 3.1 Gen 2 & USB (Universal Serial Bus)-C ports enable fast data transfers to keep your productivity high. Maximum protection The M820z AIO's integrated firmware Trusted Platform Module (TPM) 2.0 encrypts your data & passwords. Its BIOS-based Smart USB (Universal Serial Bus) Protection lets you further protect your data-simply configure the USB (Universal Serial Bus) ports to respond only to specific devices preventing unauthorized copying of files. An intrusion switch deters unapproved physical access. & with the optional Fingerprint Reader Mouse you can log in with Windows Hello. Also protects eyes The M820z display helps reduce eye strain; its antiglare panel scatters light & stays flicker-free & its Eye Comfort & Low Blue Light certifications ensure your eyes will stay comfortable when working those long hours .