Review on QSFPTEK Gigabit Ethernet Media Converter: Single Mode Dual LC Fiber, 10/100/1000Base-T to 1000Base-LX, up to 20km Range by Jay Brock

This device is very easy to use. Plug it in and you're good to go. Please note that you need a suitable fiber optic cable and two GBIC adapters (if you have the SFP version) to use it. I have the SFP version and it comes with an adapter. My switch already had a GBIC adapter and some fiber optic cables. I connected the cables, turned it on and disconnected from the network. There is no need for adjustments or adjustments. I checked the speeds and they are as expected. No problem. I use this to run a network to my garage for external cameras and some devices that work in the garage. It's a great way to provide a reliable connection to the furthest point of your home or business. Good price! I highly recommend it.