4 Port 10/100/1000 RJ45 to Fiber Switch - Singlemode/Multimode - Accepts (x2) SFP Tranceiver Modules

Distance Determined by SFP

Gigabit Ethernet Fiber Switch 2 Port 10/100/1000M TX RJ45 & 8 Port 1000M FX SFP

Ethernet physical layer - Wikipedia

Juniper EX-UM-4X4SFP 4-port 1GbE/10GbE SFP+ Uplink Module for EX4300 S

to fiber converter

Fibre Media Converter

Cisco SFP Archives - Fiber Optic Equipments

The Cisco SFP-10G-SR module gives you a wide variety of 10 Gigabit Ethernet connectivity options for your data center, enterprise wiring closet, and service provider transport applications. This module boasts a variety of features and benefits, including being the industry's smallest form factor, which results in the greatest density per chassis. The SFP-10G-SR is hot-swappable and can be switched out with ease, making upgrades and maintenance easy.

Cisco SFP-10G-SR SFP+ Transceiver Module

Elinx ESW500 Series - Managed Ethernet Switches

Troubleshoot and Maintain SFP Transceiver Modules - Cisco

SFP+ Transceiver Modules Archives - Fiber Cabling Solution

10G uplink 44-port managed industrial Ethernet Fiber switch-Industrial Ethernet Switch