1.Can detect the humidity of the surrounding environment.

2.Adjustable sensitivity (shown in blue digital potentiometer adjustment).

3.Operating voltage 3.3V-5V.

4.Analog output form.

5.With fixed bolt hole for easy installation.

6.Small plates PCB size: 3cm*1.6cm.

7.Power LED (red) and the digital switch output indicator.

8.Using LM393 comparator chip, stable.