I have several of these and they all work perfectly.

These are great when setup properly. I have one setup on all my tool heads for each caliber I reload.

This powder check works OK. Nice that it has both an audio and a visual warning. My experience was that it was more "finicky" to set up and adjust the alarm levels than the Dillon powder check. Perhaps it was me. I was using it on an XL650 for 9mm.

Second one I purchased for my other Dillon Quick Change. Simple to install AND it has saved several no powder and 1 double load in my 147 9mm. $65 buck well spent!!!

Exceeded my expectations. Pretty simple to set up, and with a little care and attention during set up and change over I'm able to get consistent results.

Audible and visual alarms provide dual sensory inputs, and for me, a valuable addition to my reloading process.

Once adjusted is very good. Difficult but not impossible to adjust. The problem is when the correct amount of powder is in the case, it is difficult to hold the stem still while getting magnet at just the right height and then tighten the allen key. Then run the press and it will beep when the next round has the correct charge, so have to adjust several times until finally right. Once adjusted it is awesome, really a great tool to have. I would suggest having clips to hold the stem at the correct height so you can easily set the magnet correctly the first time, maybe clips to hold the magnet too before tightening down.