Beetro Air Curtain 404DS (MS-A44 DS) SensorBeetro Air Curtain 404DS (MS A44 DS) Sensor The Beetro Air Curtain 404DS (MS A44 DS) Sensor is a 4 foot device designed to blow a strong stream of air wherever you need it. It's built tough to keep working even if the power goes out, so you can rely on it. Plus, it doesn't use much electricity thanks to its efficient fan and motor, only 530W. The motor is made mostly of copper, so it'll last a long time and work well. You can control it manually with