Apple iMac Retina 4K (21.5-inch, Late 2015). Intel Core i5 Quad-Core 3.1 GHz. 8GB RAM. Intel Iris Pro Graphics 6200. Upgraded with Transcend 1TB SATA SSD. macOS Monterey Installed. Although it is a Late 2015 model, I have personally used it since 2019. It has been very well maintained and is currently running smoothly. Due to the SSD upgrade, boot time and performance are much faster. The display, sound, Wi-Fi, Bluetooth, and all ports are 100% functional. Excellent for office work, study, music production, photo editing, and daily use. Interested buyers can inbox for details.