The ecobee4 Smart Thermostat has just gone on sale for $199 on Amazon. This is the first time this thermostat has ever been priced this low. The ecobee4 takes Alexa compatibility further than any other smart thermostat. Not only can you control it through Alexa on Echo and Fire TV devices, but the thermostat itself is an Alexa device that you can talk to and give any Alexa command. It’s like having an Echo Dot mounted to your wall. The ecobee4 also just became the first third-party Alexa device to gain Echo Spatial Perception (ESP), which means it will integrate seamlessly with any other Echo devices you have so that two devices don’t respond simultaneously. The ecobee4 also comes with a separate remote sensor so that it monitors the temperature of more than one spot of your home and you can add additional sensors if necessary to make it even smarter.