Hello, thanks for your interest in the C40.
There are two HDMI ports on the C40 all in one. One is HDMI-out, the other is HDMI-in. This allows the C40 to connect to an additional external monitor for a dual screen display, or to be used as a display for another device, however two external monitors simultaneously are not supported.
Thanks.
9 years, 1 month ago
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Lenovo Product Expert