It is wired to send each connected source to a separate channel rather than summing them to mono.

It features two right-angle 3.5mm TRS plugs for your mics/receivers and one right-angle plug for your camera input. The SC11 can be paired with the separately available Rode DCS-1 dual cold shoe mount to create a straightforward and effective solution for mounting and cabling two mics or receivers atop your camera.
The 30 cm long Rode SC11 is a TRS Y-splitter cable designed for connecting the mono outputs of two devices such as camera-mount microphones or wireless receivers to the stereo input of a mirrorless camera, DSLR, or camcorder.