Aprilaire 8448 Thermostat, Digital Heat/Cool or Heat Pump Multi-Stage Non-Programmable Thermostat Easy to install Battery or hardwire operable Quick reference instructions on unit LCD screen for easy reading and using Permanent memory retention Displays room temperature, temperature setting, and outdoor temperature (WITH model 8052 sensor) Millivolt compatible Water panel, air filter, dehumidifier, and HVAC service indicators