Can be equipped with a temperature controller: can be used with a series of thermostats, automatic switch, so that the controlled environment is effectively controlled, so that energy-saving comfort and no noise. Mirror: round air valve adopts high quality motor, beautiful and reliable operation, low failure rate, the material of the valve body is made of mirror, resistance, high-grade appearance. It adopts bidirectional control and can be according to different requirements. The actuator has the characteristics of small size, high torque and long service life. HVAC Air Duct Valve / Electric Air Duct Damper / Motorized Damper 125MM 220V, Weight: 1.85629224604 pounds, Manufacturer: Ohulelks