Google Nest Power Connector - Thermostat C Wire Adapter, White unit color. Model: (GVN24).

Features:

• Nest thermostats are designed to work without a C wire in most homes but for some systems, including heating-only, cooling-only, zone-controlled, and heat pump systems, you'll need a Nest Power Connector or C wire.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
• The Nest Power Connector is a simple affordable alternative to a C wire if your heating and cooling system requires one to power your Nest Thermostat
• Costs less than hiring an electrician to install a new C wire through your walls
• Installation is simple; the Nest Power Connector attaches to your furnace air handler, or zone controller and comes with simple instructions; no wiring or drilling required
• The Nest Power Connector is only compatible with 24 VAC systems; it won't work with millivolt or high voltage systems
• The Nest Power Connector is the Nest thermostat C wire adaptor that's designed specifically for Nest thermostats
• This Google Product features the Google Seal for Online Marketplace when purchased from a seller other than Amazon. Operating Temperature –22° to 140℉ (–30° to 60℃). Made with 46% post-consumer recycled materials