Features:

Low Voltage, Spring Return Damper Actuator
Equipped with Anti-Rotation and Drive Shaft Extensions for Direct Mounting to 7/16 Inch Diameter Coupling Style Dampers
Simplified Adjustable Simplified Range Stops
Wires Terminal to Motor M1-Power, M6-Common, M4-Optional

Specifications:

Manufacturer: Honeywell
Manufacturer Part Number: M847D-ZONE
Product Type: Zone Damper Motor
Voltage Rating: 24 VAC
Motor Timing: 30 Second Power Close/10 Second Spring Return
Dimensions: 5.75" x 4.5" x 5.55"
Weight: 1.42 lb.
Used For: ARD/ARDTZ/ZD/ZDTZ Zone Damper