The FE1121 3G-SDI Fiber Optic Extender is a transmitter/receiver kit supporting single-mode LC simplex fiber extensions up to 20km. It is a miniature-style extension solution that supports all SDI formats resolutions up to 1080p with audio and metadata, also supports level A and level B. It features a local SDI loop out and dual SDI outputs and supports 3G/HD/SD SDI signals. Multimode fiber can also be used but at shorter distances.