Link is a chainable mixer module, which supports stereo and mono sources.

LINK is a chainable 1U Eurorack mixer module that lets you build a custom mixer with exactly the number of channels you need. Each module accepts one stereo or mono source, with a dedicated level control and sine/cosine pan control for natural positioning within the stereo field. For mono operation, connect the source to the left input; for stereo operation, connect both left and right inputs and use PAN as a balance control.

LINK features an all-analogue, high-fidelity signal path designed for negligible distortion and reliable operation. Separate signal and clipping LEDs provide clear level monitoring, while protected inputs, overload-protected low-impedance outputs, high-quality Same Sky jacks and a Texas Instruments OPA1679 audio op-amp ensure robust performance. LINK uses the Intellijel 1U format and can be expanded at any time by adding further LINK modules.

https://www.tangeloaudio.com/product/eurorack-link-module/