This is a very un-complicated little box, that facilitates eurolite's quickDMX connection.
I use it as a transmitter - all my lights are based on quickDMX, and as my previous transmitter (the round version, many years old) start having problems maintaining the connection, I bought this one as a replacement. It worked right away, and provided a stable connection.
Yes, I would buy another one if ever needing more quick dmx :)