The Hybrid Controller Mk2 8A is an exceptional fan speed controller with digital temperature monitoring technology. Inlcudes an excellent programme which can use to remove excess humidity from a grow space during the lights off cycle by slightly increasing fan speen at hourly intervals just enough to remove excess humidity from the grow area. Includes a 5m NTC temperature probe for easy positioning. Allows fans to operate in complete silence with no buzzing or humming. Built from top quality components and is highly reliable. Precise temperature control. 5 step fan speed control.Humidity removal programme can be easily switched on and off when needed. Max load of 900w. 5 Year warranty.