Wi-Fi enabled thermostat allows for remote access via smartphone, tablet or computer. Free app for Apple and Android devices. Large, easy-to-read display. Works with virtually any system type. 7-day programming allows separate programming for each day with 4 program periods per day. Energy savings: Program to save up to 33 percent on annual heating and cooling costs (if used as directed. Savings may vary depending on geographic region and usage. Smart Response Technology continually learns to pre-heat/cool your home so you are comfortable at your pre-programmed times.