EZMultiPli (HSM200)

Any way to adjust the sensitivity of these things? Feel like mine is way too sensitive…

Unfortunately, no.

That said, this is a PIR sensor like most low cost home automation “motion” sensors and it will be set off by small changes in heat, including gusts of air blowing across it. So you might take a look at its relative position compared to any HVAC vents.

In addition, all of the tricks that people use to make sensors more sensitive can be used in reverse to make them somewhat less sensitive. See the following:

I realize that since this is a plug-in sensor you will have fewer options about where to place it, but you may still find you can change the apparent sensitivity Just by locating it on a different wall.