FS4's SFP options include both 12G/6G-SDI HD-BNC and Fiber I/O options including single and dual channel Single Mode options and Multi-Mode options, allowing great SDI flexibility and fiber cable runs of up to 10 kilometers to be connected directly to the FS4 without the need for separate fiber to SDI conversion. Also available are 3G-SDI Fiber LC and SC SFP options.