Hydrofarm Digital Heat Mat Thermostat 

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The Hydrofarm Heat Mat Thermostat is a digital temperature controller for the heat mats used under plant trays. 

Compatible with all heat mats, the electronic Heat Mat Thermostat lets you have complete control over the temperature of the growing medium of your tender seedlings or plants clones.

It also provides constant optimum temperatures for sensitive garden plants, such as orchids or mushrooms.

The Heat Mat Thermostat controls the root mass temperature in colder or warmer environments utilizing a water resistant stainless steel temperature probe.

It has an illuminated indicator light and a standard 120V 3-prong ground plug.

Controllable range from 68 to 108 degrees Fahrenheit (can change to Celsius). 8.3 amps / 1000 watts