Unfortunately, this could be a really good trigger. The housing is strong but only as strong as the weakest link. The small cables will wear over time and I have used them for over a year now touring with them and I have had to resolder them several times as the mechanic wear and tear just tears the soldering and the small flimsy cables. I am looking for replacements now.
The heavy duty housing are good but can be a hazzle placing them in the air wents as they are big.
The rim piezo triggers are not good and I have never been able to get them to function properly.
Overall not a good internal trigger unfortunately.
Sadly, these are the only ones Thomann offers. I would check
Joebeeky, ITM2 by Helensson or other proven internal triggers instead
Maybe Thomann could start importing these as they come from the UK and US. Please!