If I had the unit ever had before ... so I could have saved a lot of money. Works perfectly easiest setting / programming. I take the equipment in winter for the greenhouse. There only to be heated when under 2 degrees minus outside. So probe into the open long enough and fits perfectly under the door or carefully under the window frame, unit inside the socket, heater off, finished. Especially when it's still very cold at night often have to not ever remember, or even to turn on the heating suspicion. Clear recommendation.