I have this one and it has a weird quirk: it takes one AAA battery but if you leave the battery in there, the battery dies within a day. Even if you turn it off, it’s still using the battery. It’s like it never really turns off. So just make sure to take the battery out when you’re done using it.
That's a serious design flaw that earns it a hard pass from me. The one I have cost less than half as much, and after two years of fairly regular use is still using the original button cell that came with it.
Also, their record level "feature" seems like a complicated solution in search of a problem. I just remove my turntable mat and place my $11 scale directly on the platter when taking my readings.
"And, with this VTF gauge, there is no need to remove your platter mat"
Yeah, because that is REALLY hard to do.
"PLEASE NOTE: Although no tools are required, installation of the record-level cantilevered extension arm requires a good pair of glasses, a bit of technical savvy, and a good dose of patience. The VTF must be placed on a level, stable, draft-free, surface during VTF measurement and during any recalibration procedure. Requires one Alkaline AAA battery (sorry, battery is NOT included)."
Sounds to me like getting this thing set up and calibrated takes a lot more time and effort than the "problem" it's supposed to solve (removing and replacing the platter mat when setting your VTF).