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. Universal compatibility, works with virtually any system type. 7-Day programming allows separate programming for each day with 4 program periods per day. Pre-programmed energy-saving schedule. Precise accuracy of /- 1 deg F. Auto-change from heating to cooling. Permanent and temporary hold. Real time clock, keeps the time during a power failure and automatically updates the time for daylight savings (optional). Automatically downloads software updates. Secure network. Does not work with electric baseboard heat (120 to 240 V).