Standard Features - High Definition, Full Color Display Larger, full color display screen makes it easier to read - Interview-Based Programming Asks you questions and then programs itself based on your answers - Connects to the Internet Monitor and control your HVAC system over the internet from your PC, smart phone or tablet (with Total Connect Comfort Services) - Displays Outdoor Temperature & Humidity Just like a weatherstation, right from the home screen of the thermostat (with Wireless Outdoor Air Sensor) - Temperature Control Anywhere in the Home Sense and make temperature adjustments from anywhere (with Portable Comfort Control) - Diagnoses System Performance Alerts you of potential system issues or failure before it occurs so that you can take action - 7-Day Programming Allows separate programming for each day of the week - Time-of-Use Scheduling Automatically adjusts your home's temperature when utility prices are at their highest to help you save on energy costs - All-in-One Control Controls both temperature and air quality products such as a humidifier, dehumidifier, and ventilation system all from a single control in the living space - Tri-Lingual Adjust settings to display in English, Spanish or French - Models Numbers: THX9321R5000, YTHX9321R5030, YTHX9321R5012, YTHX9321R5079, YTHX9321R5003, YTHX9321R5061, THX9421R5005, THX9421R5013, YTHX9321R5002, YTHX9421R5051, YTHX9421R5028, YTHX9421R5069, YTHX9421R5010, YTHX9421R5077 - 5-Year Warranty