Sadly, pairing does little at launch, with no pen button mapping on the device. That provides low latency to ensure a responsive feel, acceptable precision, and an LED light for connectivity status and battery levels. This slimline revision of the stylus trims extra fat from the legacy design, parting with the traditional pen-inspired silhouette for one akin to a carpenter's pencil.

It has the expected high-precision hardware inside, as first shipped with the Surface Pro X in 2019. The Microsoft Surface Slim Pen boasts the same high-quality construction and in-hand feel of other Surface Pens. And when paired, it's suited for note-taking via OneNote, annotations in Office, or signing documents with apps like Adobe Acrobat. It's the one in the commercials, product renders, and store listings often found adjacent to the Duo. While the Microsoft Surface Duo supports the majority of existing Surface-branded pens, there's no competition with its latest and greatest, the Microsoft Surface Slim Pen.

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