The Titan Controls® Mercury® 4 – Multi-Function Fan Speed Controller allows user to select minimum fan idle speed between 25% & 60% of fan rating. Enables the user to activate/deactivate low temperature safety feature. Temperature control range is 55°F to 95°F. 6 foot temperature probe is accurate to within 2°F. Enclosure protects internal components from dust, rust and moisture. 6 Amps maximum/120 Volts/60 Hz.