The converter you need when converting between Quad Link HD‑SDI, Dual Link 3G‑SDI and Single Link 6G‑SDI Ultra HD equipment. Mini Converter SDI Multiplex 4K includes 4 x 6G‑SDI inputs and 4 x 6G‑SDI outputs so it can convert in both directions. Also converts between Dual Link HD‑SDI 4:4:4 and Single Link 3G‑SDI.