01143.0-00 is an EATON Stego® Concealed Fan Variable Speed Controller. It is designed to be mounted inside a ventilation system, providing continuous variable speed fan adjustments, controlling air quality and noise levels in your space. The device is equipped with two pre-programmed settings, low and high speed, allowing you to quickly switch between both levels depending on the demand and environmental conditions. The device also has 5 additional settings and a 7-day timer, allowing you to control air quality and temperature on a daily basis. The controller is also fitted with an air quality sensor (CO2) to measure fecal matter, dust and other contaminants in the air.