iMac (Retina 4K, 21.5-inch, Late 2015) Processor: 3.1GHz Quad-Core Intel Core i5 Memory: 16GB 1867MHz DDR3 Serial Number: CO2SR04AGG7F The memory was upgraded from 8GB to 16GB at the time of purchase. Please check the photos for storage details, etc. Due to a malfunction with my smartphone's camera, I am unable to take clear photos, but the screen is in excellent condition with no cracks or chips. The keyboard and mouse were used with covers for a short time and then replaced, so they are also in excellent condition. I was still using this, but I am selling it because I purchased a new computer. I have followed Apple's instructions and erased all data. - Brand: Apple - Model Name: iMac - Ports: USB ports, SD card slot - Accessories: Keyboard, mouse Please note that returns and claims are not accepted after shipping.