Honeywell Wireless Outdoor Reset Kit W8735Y1000Used with the Honeywell L7224 Aquastat, the Wireless Outdoor Reset Kit enables boiler temperature reset, based on outdoor temperature. Contains W8735ER1000 Equipment Interface Module & C7089R1013 Wireless Outdoor Sensor Product Specifications BRANDHoneywell WIDTH INCHES4-9/16 DEPTH INCHES1-1/4 HEIGHT INCHES5-9/16 COLORGray TEMPERATURE CONTROL RANGE °F-30 to 150 VOLTAGE24 OPERATING HUMIDITY RANGE (%RH)0 to 95 MOUNT TYPEWall FOR USE WITHAquastat L7724 INCLUDESW8735ER1000 LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERW8735Y1000