Nest Learning Thermostat (1st Generation) - Wi-Fi/Bluetooth - Android/iOS - Stainless Steel

It has a new, slimmer design, is enclosed by a solid stainless steel ring, and works with 95% of low voltage systems. The Nest learning thermostat learns what temperatures you like, turns itself down when you're away and can be controlled from anywhere over Wi-Fi. By programming itself, the Nest thermostat can save up to 20% on your heating and cooling bill.