This Google Nest G4CVZ Thermostat in black is brand new and still sealed. It is a programmable thermostat that can be used with a variety of systems and is compatible with Google Home/Assistant, Amazon Alexa, and Nest. The thermostat is wireless and can be wall-mounted or surface-mounted. It features built-in WiFi, Bluetooth, and app control. The sensor technology is temperature-based and the system switching is automatic. The thermostat is resistant to water and is made of plastic. Items included are batteries, display base, and wall screws.