Performance Series Deluxe Programmable Thermostat Comfort Control at Your Fingertips   Auto changeover. All-electronic operation. Battery-free backup stores programmed information indefinitely. Copy previous day feature. One-button vacation mode. Large push buttons and LCD screen. Seven-day programming with four time periods per day. Five-year limited parts warranty.   Benefits - Carrier’s Performance Series Deluxe Programmable Thermostat allows you to adjust temperature with intuitive programming. Features - When setting up your Deluxe Programmable Thermostat, you'll appreciate its ease of use. The following features are standard:   Easy-to-follow instructions are posted inside the door for quick reference. Copy Previous Day button duplicates the previous day’s schedule for simple programming. Clean filter reminder lets you know when the filter needs to be cleaned or changed.         Specifications