If you want to make the best use of Amazon Echo and put Alexa assistant to work, check out these accessories below that you can use with your smart speakers.  * Amazon Smart Thermostat: This is an easy-to-install Energy-Star certified thermostat from Amazon that helps you reduce your energy usage. * Ring Video Doorbell: It provides 1080p HD video, crisper night vision, and customizable motion zones. It is powered by a built-in rechargeable battery or wires to the existing doorbell line.