Quote Originally Posted by sarahlovesmiike View Post
If they only come with one probe then how does it regulate both heat mats?
Those kind of thermostats can only regulate two heating devices at the same temperature. They just have to be identical heat sources. So if you plug in two heat mats of the same size, put the probe on one heat mat and the other will heat up the same way.

If you want to set each heat mat to its own temp with just a thermostat, you would need a herpsatat II, which are over $200.