this is new but the box has been opened. Please see pictures Google Nest Power Connector - Nest Thermostat C Wire Adapter - C Wire Adapter for Smart Thermostat Accessories 1.1 x 3.03 x 3.98 About this item Nest Google Thermostat Power Connector (snow)FeaturesMaterial: Thermostat Made In Taiwan Installation is simple; the Nest Power Connector attached to your furnace air handler, or zone controller and comes with simple instructions; no wiring or drilling required 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 bin 1 Condition: New Without Tags