exact item shown, three AT-MC1004 gigabit ethernet converters, includes OEM power supply. photos show you LEDs and the Lser on hte TX port
from the manual (located here: https://docs.rs-online.com/80cc/A700000008933736.pdf )which is a little more recent than this device so it only as the XL and LH, and not the one with only a single pair of optical connectors and a copper ethernet.
The AT-MC104XL and AT-MC104LH media converters feature two
100Base-FX fiber optic ports with either dual SC or dual ST connectors.
One port uses multi-mode fiber optic cabling and has a maximum
distance of 2 kilometers (1.2 miles). The second port uses single-mode
fiber optic cabling and has a maximum distance of 15 kilometers (9.3
miles) to 40 kilometers (24.8 miles), depending on the model.
These media converters operate at 100 Mbps and feature half- and full
duplex operation