C-Wire Is Needed For The Amazon Smart Thermostat To Work With Alexa And Is Product Features 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. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!