The FE1121-12G 4K 12G-SDI Fiber Optic Extender is a transmitter/receiver kit supporting single-mode LC simplex fiber extensions up to 10km. It is a miniature-style extension solution that supports all SDI formats resolution up to 4k with audio and metadata. It features a local SDI loop out and dual SDI outputs and supports 12G/6G/3G/HD/SD-SDI signals.