The 4 amp pro step controller is the best AC fan controller available. Quiet, simple to use and the most efficient way to regulate your AC fans, with no clicking between steps like other AC fan controllers.
- Silent controller no clicking between the 5 step.
- Made in Europe to the highest European standards.
- Accurate temperature control.
- The most efficient controller for AC fans.
- No humming or vibration from your AC fan, even at low speeds.