The ASUSPRO A6420 & A4320 All-in-One PCs powered by Intel® Core™ processors provide enhanced computing power and streamlined management for improved work efficiency. The innovative A6420 & A4320 also feature an optional NFC module, a smart card reader, and a tool-less rear cover for user-upgradable storage and memory. For more information about ASUSPRO All-in-One PCs, please visit https://www.asus.com/Commercial-AllinOne-PCs/