Operating System Type: iOS/iPad OS Series: iPad Pro Generation: 1st Generation Screen Size: 12-12.9 inches Communication Standard: Cellular Model / Carrier: docomo I acquired this used and have been using it for about 3 years. I mainly used it for viewing sheet music, and it was very useful. I am selling it because I purchased a new iPad. When I bought it, there was a small gap near the left edge of the screen, but I was able to use it without any problems. The SIM card works fine with mineo's D plan. I will also include the Logicool keyboard, case, and privacy filter that I purchased when I was using it. The keyboard uses SmartConnect, so it doesn't need to be charged and was very convenient.