I bought this device specifically for its RDM capabilities, and wasted hours testing with various fixtures and software but to no avail.
The major issue is there is no Firmware updates available, the device ships with v.1.3 and on the website is only v1.1 available, so they have never published any updated - however, regardless of the firmware RDM simply does not work at all. I asked a colleague who has one to check theirs and they had the exact same problem, it looks like it is simply not enabled in the firmware.
Contacting the producer is impossible, they have no means of contact and neither does the parent company. Just a wholesaler who has zero intention of customer service.
Otherwise, cannot fault the Artnet, worked perfectly and the LCD Display was very convenient, but if you need RDM... best check it carefully.
Other than this it is well made, can't complain about the manufacturing quality or the finishing, tough ar rugged overall.