text: Did not work at all.
  
  I bought two of these and NEITHER of them worked. I have a ball python that has a heat mat under his terrarium that works perfectly. I plugged both in programmed it to my desired temperature and left it in for a 24 hour period. The heat in the terrarium never got about 72 degrees F. This is extremely upsetting as I said neither of the two worked and my return window has already closed so I’m stuck with $50 worth of useless heat controllers.