Woot offers Amazon Smart Thermostat – ENERGY STAR certified, DIY install, Works with Alexa  €“ C-wire required for $29.99. Free shipping for Prime Members.

Product Description:
Amazon Smart Thermostat is ENERGY STAR® certified. According to EPA estimates, ENERGY STAR certified thermostats save an average of $50 on yearly energy bills. Check with your energy provider about available energy savings rebates to save on your purchase. Plus, eligible customers can enroll in ongoing energy savings incentives with their energy provider to keep saving all year long. Get information in the Alexa app.

• Smart upgrade - Amazon Smart Thermostat is an easy way to switch from a traditional thermostat and help reduce energy usage.
• Save money - After purchase, Amazon will send you an email with details about rebates that may be available from energy providers in your area. Explore rebates above.
• Save energy - According to EPA estimates, ENERGY STAR certified thermostats save an average of $50 on yearly energy bills.
• Automatic comfort - Alexa can do the programming for you, updating the temperature to keep you comfortable.
• On-the-go control - Let Alexa set the temperature, or set it yourself from anywhere with the Alexa app.
• You can do it - The Alexa app will guide you through the installation process, but customer service is always available.
• Reliable - Made with Honeywell Home Thermostat Technology and backed by 130 years of experience.
• C-Wire Required - Not included in this model