The Titan Controls® Mercury® 3 – Day/Night Fan Controller automatically increases or decreases fan speed based on controller set points. Allows user to adjust deadband range to meet garden requirements. 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.