The Blackmagic Design 12G BD SFP Optical Module Adapter is a spare host adapter for the ATEM Studio Converter, ATEM Talkback Converter and Blackmagic Studio Cameras. This adapter is fully utilized by products that support 12G SDI and according to Chris Pearse, Blackmagic Design Product Specialist, The module uses LC connectors, and is intended to be used with 1310nm, Single Mode fiber . And just like the 6G version, the ADPT-12GBI/OPT is a Duplex transceiver and works in either Singlemode (SM) or Multimode (MM). Singlemode (SM) is recommended.