High-performance iMac desktop with Retina 4K display. - Model: iMac (Retina 4K, 21.5-inch, Late 2015) - Processor: 3.1GHz Quad-Core Intel Core i5 - Memory: 8GB DDR3 - Graphics: Intel Iris Pro Graphics 6200 1536 MB - Storage: 1.02TB Fusion Drive - OS: macOS Monterey 12 - Accessories: Power cable ※Bluetooth does not turn on There are several issues with the Mac, and Bluetooth does not turn on, so wireless keyboards and mice cannot be used. How about a USB keyboard and mouse? Or how about someone who can repair Bluetooth to turn on? ※Due to work reasons, it will take a few days to ship. Please be understanding. Thank you for viewing. Model name...iMac Retina 4K 21.5-inch (2015)