Nest Learning Thermostat, 2nd/3rd Generation
My energy bill was approx. $250 per month before purchase. Energy bill is now ~$105 after purchase (2 bills since purchase). This thing paid for itself in no time... BEST INVESTMENT EVER.
The Nest Learning Thermostat is a useful and thoughtful gift idea. It has a slim design enclosed by a solid stainless steel ring and works with Alexa. This lovely thermostat learns favorite temperatures, turns itself down when there is no one home and can be controlled from anywhere over Wifi. Best of all, it saves money by lowering heating and cooling bills.