This is a Microsoft Type Cover. The only included item is the cover itself; there is no outer box or manual. I do not know the exact model number, so please check the photos of the connection to the main unit to confirm compatibility and make your purchase based on your own judgment. Regarding the operational check, I used it during the initial setup of a Surface Go tablet, which I received as an included item, and performed a simple operational check. After that, I haven't used it and have stored it at home. There is some discoloration on each corner due to use. In addition, there is a general feeling of use, so please check the photos. Please purchase if you understand that this is a used item. The color is a bluish gray. Due to amateur photography, the actual color may differ from the photos. We cannot accept returns for reasons other than operational defects, such as a different color than expected or purchasing the wrong compatible model, so please understand. If you have any questions, please leave a comment.