The TrolMaster Hydro-X Thermostat Station TS-1 is a climate controller designed for use with air conditioners and exhaust fans. Manufactured in 2020 in China, this blue thermostat station is a 4-pack of individual units. It utilizes a proprietary smart home protocol for easy operation and customization. Perfect for improving indoor air quality and temperature control, the TrolMaster Hydro-X Thermostat Station TS-1 is a reliable and efficient solution for maintaining a comfortable environment in your home.