Media Converters do exactly as their name suggests, they convert from one media to another. This means typically from copper to fibre but can also mean from one type of fibre to another type of fibre.
Select the Ethernet speed that is to be used.
Ensure that the fibre type matches that of the equipment and cabling already installed.
Match the connector type to the on site cabling.
Select standalone for a single conversion. For multiple runs select a chassis and then cards to match the conversions required.