There are many keyboards that are not recognized. Others usually worked, but I haven't checked them in detail, so please consider this as junk. In my subjective opinion, the appearance is relatively clean. How about using it with an external keyboard, for parts, experiments, or servers? ＜Overview＞ CPU: Core-i3 3120M Memory: 4GB (2G x 2) Display: 15.6 inch (Super Fine LCD) No internal drive Optical Drive: Blu-ray drive ※Please check the details on the internet, etc. I think the battery is completely depleted. AC adapter: Third-party product Please consider the above.