Electronic humidistat to automatically activate/deactivate the ventilation unit when the R.H. goes over/beneath the set threshold. Front graduated knob to adjust the humidity threshold between 50% and 95% R.H. Integral over-run timer adjustable from 1 to 25 minutes. Front yellow led to indicate that the load is active: – led on means that the ambient humidity is higher than the pre-set level – Blinking means that the with relay on but humidity level under threshold (timing in progress) IP40 protection degree. 230V~ 50-60 Hz. Max. load 2A. Ambient temperature from 0°C to +35°C. Relative Humidity 95% at 35 °C. Available for surface or recessed mounting.