The Google Nest Power Connector C-Wire Substitute GVN24 GA02493-US 2-Pack is a set of plastic connectors designed specifically for Nest thermostats, including models such as Nest Thermostat E, Nest Learning Thermostat (3rd gen), and Nest Thermostat. These connectors are compatible with Nest thermostats and provide a reliable way to power the devices without the need for a traditional C-wire. The manufacturer offers a 1-year warranty for added peace of mind, making them a convenient and efficient solution for connecting and powering Nest thermostats in your home.