- Powered by the Environmental Monitoring System Hub no external power needed. - Measures temperature from -40 to +75° C (-40 to +167° F). - Measurement resolution of 1° C (1°F increments). - Measures 0 to 100% relative humidity. - For use with AlertWerks sensor hubs as part of the AlertWerks environmental monitoring system. - Capacitive semiconductor sensor. - Sensor element is waterproof. - Warranty: 1 Year Double Diamond™ Warranty (Standard)