The R80DWL is a round, modulating, wireless zone damper that is used with the WRCD Wireless Remote Damper Control to adjust the amount of airflow to a space anywhere from 100% to nearly 0%. 
 
Compatible Control
WRCD Wireless Remote Damper Control (Sold separately)
 
Specifications
Available Unsealed or Sealed. Unsealed-Allows some air leakage in the closed position. Sealed-Allows minimal air leakage in the closed position.
Wireless - FCC certified 915MHz ISM band.
Damper Sizes - 6" to 20" diameters.
Damper Shell - Spiral wrapped 24 ga galvanized steel.
Damper Blade - 20 ga galvanized steel.
Mounting - Two screws. Molded glass filled ABS shaft and keyed to eliminate blade alignment.
Wiring - 2 wire connection to R and C equipment terminals or separate 24VAC transformer.
Electrical Power - 24VAC or 24VDC. 2.8VA operating and 1VA holding.
Output Torque - 80 in-oz.
Operation Time - Fully opens or fully closes in approximately 3 seconds.
LED Indicators - Green LED indicates fully open. Red LED indicates fully close. Blinking Green/Red indicates a position between open and closed.
Multiple Dampers - Up to 4 dampers can be daisy chained to define a zone.
Operating Temperature - -20 to 175 degrees F