Rainbird Wireless Rain and Freeze Sensor System with 1 Controller Interface and 1 Sensor Wireless rain sensor shuts off irrigation when it rains - Freeze sensor shuts off irrigation when temperature drops below set point - Saves up to 35% on water usage Intuitive, icon-driven interface for easy programming - NOTE: Not compatible with Rain Bird ESP-SMT or ESP-SMTe smart controllers Adjustable rainfall settings from 1/8 in to 1/2 in - Adjustable low temperature settings from 33 DegreeF to 41 DegreeF Enhanced antenna array provides superior signal reliability that overcomes most line-of-sight obstructions Suitable for use with Rain Bird and competitor 24VAC irrigation controllers