The Emerson Smart Sensi Lite Classic Digital Thermostat ST55U WiFi in White is a modern and efficient home improvement product designed for controlling heating, cooling, and air systems. With built-in WiFi and smart compatibility with various platforms like Apple HomeKit, Google Home, and Amazon Alexa, this thermostat offers convenient remote control and app control features. It is programmable with a 7-day schedule and has a sleek touch screen display for easy adjustment. The thermostat runs on a 24V corded electric power source and is suitable for various systems including oil, gas, and geothermal. Its wall-mounted rectangular design and temperature sensor technology make it a reliable choice for maintaining optimal indoor temperatures.