Universal Application - works with conventional and heat pump systems up to 2H/2C?? it's one thermostat for nearly every application</br>Program is retained in memory in the event of a power outage Includes change reminders for filters and low batteries</br>Separate programming for each day of the week - 4 periods per day</br>Maximum comfort - Smart Response technology learns the amount of time a system needs to reach a desired temperature and adjusts accordingly</br>Precise temperature control of +/-1 Degree for consistent comfort</br></br>Amazon.com</br></br><div class="plus" >  <div class="half-col">   <p>Touch screen 7 Day Programmable Thermostat???RTH8500D</p>  <p> ??? User-friendly interaction<br/> ??? Large touchscreen display with backlight<br/> ??? 7-day programming</p>   <p>Honeywell's touch screen 7-day programmable thermostat provides maximum flexibility for busy lifestyles. You set it up to adjust the temperature when you are away or asleep during times when you don't necessarily need to heat or cool your home to optimum comfort?? and your heating and cooling equipment runs less. The RTH8500D features a green backlit touch screen interface with simplified programming and easy to follow text instead of symbols. Exclusive Honeywell Smart Response Technology continually adjusts the pre-heating/cooling of your home so you are comfortable at your programmed times. It also automatically determines if your home needs heating or cooling to provide maximum comfort. Universal compatibility means it works with virtually all system types.</p>  <p>Features:</p> <ul>  <li>7-"y Programming???allows separate programming for each day</li>  <li>Display???straightforward display keeps operation and programming simple</li>  <li>Backlit Display???easy-to-read?? even in dimly lit rooms and hallways</li>  <li>Smart Response Technology???continually ad