Brydge is a company that mostly makes keyboards, and it has a new line that's Designed for Surface. The keyboards have a hinge that turns the tablets into more of a laptop-style device.
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Brydge has formally announced its SPX+, a laptop-style keyboard for Microsoft's Surface Pro X. It's Designed for Surface, and has backlit keys, a Precision trackpad, 180-degree hinge, and more.