Add a crossover to any Ethernet cable with this adapter.
Works great at testing out uplinks lines before making permanent changes to a line. Bought a couple to keep in the toolbox. Also works great for when you need to put out a temporary switch and plug into the uplink.
I ordered batteries and a set of test leads. I received them within three days of when I ordered them and I got a great price. Fast service and a great price - what more could you want.