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SMS Controller 12amp
Electronic speed controllers are great, but when you need silent running, fingertip control, with NO annoying humming, you can't beat an old school mechanical unit like the SMS. It has an external thermostat and adjustable speed control for running both your in and out fans. Comes mounted on a board and wired up to a 13 amp plug; simply plug your fans in, no need for any wiring. Set the maximum temperature for your room and the SMS will silently speed up and slow down your fans automatically. Suitable for the largest of fans.
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