Amazon's smart thermostat falls to a new all-time low of $42 ahead of Prime Day

Amazon has already started selling a bunch of its smart home devices at a discount, almost a week before Prime Day even begins. One of the most notable deals that's already available is Amazon's smart thermostat, which you can get for $42 -- as long as you're a Prime member. Amazon's smart thermostat debuted in September 2021, giving you an affordable option to control your home temperature. But it's Energy Star-certified and can save you an average of $50 on your electric bills every year. Plus, it's Alexa-compatible and allows you to use the voice assistant to set custom routines for heating and cooling.