Behringer B210D connection

[Bow_Wazoo]

Does anyone know, whether the 6.3mm TRS line-in connection of the B210D is stereo, so that I can connect a stereo source (L and R) and the signal is added to mono (when used with one speaker)?
Unfortunately, the connection in the description refers to 2 speakers with a stereo source.

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[AnalogSteph]

The TRS inputs are a 1:1 equivalent of the XLRs just below, so no, they are not stereo, and you will have to downmix externally.