This thermostat is designed for use with heat pump systems and offers three heating stages and two cooling stages. It features a large backlit display for easy reading, as well as programmable temperature settings to help save energy. The TSTAT also includes a filter change reminder and can be set up to work with remote sensors for added convenience. With its durable construction and reliable performance, this thermostat is an excellent choice for HVAC service technicians looking to upgrade their clients' heating and cooling systems.