This is the air vent that automatically regulates airflow to a room, keeping it from becoming overheated or overcooled. The air vent is controlled by a wireless thermostat placed up to 30' away. When the desired room temperature is reached, the thermostat sends a command to the vent, which closes its louvers, restricting the flow of hot or cold air. By redirecting heating or cooling away from the room to the rest of the house, the vent also helps reduce energy usage. The unit installs easily without any modifications to your existing HVAC system and replaces a standard floor or wall register. Durable white plastic. Requires four AA and four AAA batteries that provide power for up to a year. 6" High Register. 10" W x 3" D. (3 lbs.)