Nest Thermostat E, Saves Energy, Design & Frosted Display Blend Into The Background, With The Nest App On Your Phone, Tablet Or Laptop, You Can Change The Temperature From Anywhere, Office, Beach, & Bed, Independent Studies Showed That Nest Saved On Average Of 10% To 12% On Heating & 15% On Cooling, SIGNED RESELLER AGREEMENT IS REQUIRED TO ORDER.