I can only confirm this works if you register an Eversource acct with the EnergyFederation Mass Save site to get the instant rebate. It's possible other utility services might have the discount, so it's up to you to try it
Ordinary thermostats read the temperature in one room which can make your favourite rooms uncomfortable. The ecobee4 works with remote sensors to deliver the right temperature in the rooms that matter most. The ecobee4 thermostat uses thousands of data points to make intelligent and personalized heating and cooling decisions to save money on energy costs, improve heating and cooling performance, and ultimately improve comfort.
The ecobee4 has embedded microphones, so you can hear and speak to it from across the room. Its the smart thermostat that looks at home on your wall that you can hear and speak to from across the room.
Adjust temperature and comfort settings easily from the ecobee mobile app on your Android and iOS devices, including Apple Watch.
Compatibility: The ecobee4 is compatible with most low voltage heating/cooling systems (2H/2C) and heat pumps (4H/2C). It also works with Apple Homekit, Amazon Alexa, Samsung SmartThings, and IFTTT.
Smart Home/Away can automatically enable the right mode for energy savings when it senses no one is home
4.3 inch full color touchscreen
Free energy reports show you how much energy you've conserved each month and provide insight into your heating and cooling equipment
Powered through terminals C and Rc
Remote sensor to help manage hot and cold spots