The ES Non-programmable thermostats offer a “Best In Class” 22Amp Max Rating for larger heating circuits. Use where high accuracy is desired, and programmability is not needed. With a large back-lit display, this line voltage thermostat offers one-of-a-kind features including a memory backup for power outages. All the features you want with only two buttons. Simple has always been better. Two keys on the front control the temperature up and down. With comfortable color backlighting and an on/off switch to control the illumination and system. The comfort color backlight display is blue at 65ºF and red at 75ºF and varies in color making it quick and easy to know your temperature. The illuminated LCD display can be read across the room making it easy to see at night. Simple, accurate control is the goal of the ES model. No fancy programming, just dependable temperature control for your home, saving money on your heating bills.