The Nest Learning Programmable Thermostat Model 02A is a sleek and modern device made of stainless steel, featuring a 7-day programmable schedule for optimal energy usage. It is powered by batteries and is compatible with various heating and cooling systems, including central heating, wall heaters, and air conditioners. The thermostat is designed for easy control through a variety of methods, including Wi-Fi connectivity, remote control, and the Nest app. With its circular shape and silver color, this Nest thermostat is a stylish and efficient addition to any home.