Carrier VST3900, Venstar Programmable Thermostat

This Carrier thermostat allows users to control heating and cooling systems. It features a digital display for easy reading of temperature settings. Users can program schedules to optimize energy use and comfort. The device supports multiple stages of heating and cooling, making it suitable for various HVAC systems. It includes options for fan control and system mode selection. The thermostat also has a non-volatile memory to retain settings during power outages.