here for specs. See
our Wireless rain sensor:
Easily installed on any automatic irrigation
system, Mini-Clik® shuts sprinklers off in a storm and keeps them off,
automatically compensating for the amount of rainfall that occurred. Disks
absorb water and then expand proportionally to the amount of rain that fell.
As the moisture-laden disks expand, they eventually activate a switch that
interrupts the circuit from the controller to the solenoid valves. Once dry,
they contract and release the switch and automatically reset without ever
affecting your controller.
5 year warranty !