Google Nest Learning Thermostat 3rd Gen, Mirror Black w 3x Temperature Sensor 4810 followed by one more XA

followed by one more XA elements and an aspherical element with the final XA element at the back of the lens group

and a high-contrast screen

000:1 contrast and perfect framing

Three ED (Extra-low dispersion) glass  elements

Google Nest Learning Thermostat 3rd Gen, Mirror Black w 3x Temperature Sensor 4810 followed by one more XAThis Nest Learning Thermostat memorizes your favorite temperature settings and adjusts throughout the day. You can also control this Wi Fi thermostat from your smart phone or other remote devices while youre away. Redesigned with a sleeker, thinner look for a larger, sharper display, the Nest thermostat lights up and easily displays the temperature when you enter a room. This ENERGY STAR rated thermostat saves you on your energy bills: up to 12