There are a few sticker marks on the bottom.

It has a Windows 10 Pro product key sticker, and Windows 8.1 motherboard activation. Let me know which OS you would like, or I will ship it with Windows 8.1 Pro installed.

Brand new battery currently with fewer than 10 cycles.

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On Feb-07-17 at 13:52:37 PST, seller added the following information:

The touchscreen resolution is 1920x1080.