The actuator has the characteristics of small size, high torque and long service life. It adopts bidirectional control and can be according to different requirements. 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. 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. HVAC Air Duct Valve or Electric Air Duct Damper or Motorized Damper 125MM 220V Outside diameter:125mm Rated torque:1Nm Power consumption: 4VA Air valve angle:0°,90° Power:220VAC Life: 50,000 times Both the valve opening and the valve closing need to be energized, and the actuator automatically shut off after completing an action. An action time is about 10 seconds. This damper is suitable for controlling the air volume from full flow to shut off. The damper is constructed with polished stainless steel and come with aluminum valve plate. It can work with thermostat, open and close automatically. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Silver Material:Stainless steel Package Contents: 1 x electric damper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.