As it was adviced several time in the community forum I bought MidiBeam V1 wireless MIDI transmitter. No question, it has the best specs of the market and especially a very low latency (0,38ms).
But I took the risk to buy a used “damaged” unit from Reverb for 15€
Panda-Audio adviced to reflash the units with the V2 arguing in “most cases it solves the problem”, which worked perfectly and I now own a fully functional MidiBeam
Now my question is, do you experienced any loss of firmware that necessitated to reflash the units? (It would be too bad to have this issue just before a gig…)