I bought two different sized ScatMats, both with the power pack.  Both of them worked good for about a month before randomly activating.  It's not the mats as when the 1st one started having issues I swapped the box over to the other mat and the problem followed.  There is nothing shorting it nor are the mats dirty.  I've been an electric tech for the past 30 years so I can troubleshoot a simple issue like this.

The way these are designed to operate is when the pet makes contact on the mat wires it activates the shocking circuit - which worked great the first time the cats jumped on it.  Then they started activating randomly by themselves to the point where the batteries would wear down after a few days.  Now they are both constantly going off even with the 120vac adapters I bought for them.

The good part is the cats are no longer going into that area as the thing is always making the snapping sound of the spark circuit.  The bad thing is that it is annoying as you can't have it in a bedroom, kitchen or TV room as they both are constantly going off, even with clean mats and on hard surfaces or carpet.

So you get 3 stars... they worked, but not for very long.
I bought two different sized ScatMats, both with the power pack. Both of them worked good for about a month before randomly activating. It's not the mats as when the 1st one started having issues I swapped the box over to the other mat and the problem followed. There is nothing shorting it nor are the mats dirty. I've been an electric tech for the past 30 years so I can troubleshoot a simple issue like this. The way these are designed to operate is when the pet makes contact on the mat wires it activates the shocking circuit - which worked great the first time the cats jumped on it. Then they started activating randomly by themselves to the point where the batteries would wear down after a few days. Now they are both constantly going off even with the 120vac adapters I bought for them. The good part is the cats are no longer going into that area as the thing is always making the snapping sound of the spark circuit. The bad thing is that it is annoying as you can't have it in a bedroom, kitchen or TV room as they both are constantly going off, even with clean mats and on hard surfaces or carpet. So you get 3 stars... they worked, but not for very long.