Features:

Works with any Alarm Generating Enviracom Enabled Control
Local LED Alarm Present Indication
Local LED Communication Active Indication
Screw Terminal
Simple Low-Voltage, 5-Wire Installation

Specifications:

Manufacturer: Honeywell
Manufacturer Part Number: W8735S3000
Product Type: Oil Electronic Aquastat Controller Alarm Module
Voltage Rating: 18 to 30 VAC
Frequency: 60 Hz
Temperature Rating: -30 to 150 Degrees F
Mounting Type: Wall
Humidity: 0% to 95% Relative (Non-Condensing)
Terminal Type: Screw
Dimensions: 3.35" x 5.3" x 1.4"
Weight: 0.13 lb.
Includes: L7224U Oil Electronic Aquastat Controller