The official Ecobee C-Wire Adaptor Power Extender Kit (PEK) 810-00002 is designed specifically for use with Ecobee 3 Lite, 4, 5, Smart and Smart Premium thermostats. This white, corded electric power extender kit includes a 4-wire wire configuration and is Energy Star compliant. For use with HVAC systems without a C-wire. As it powers the Ecobee thermostat, it is compatible with various smart home systems such as Apple HomeKit, Google Home/Assistant, and Amazon Alexa. The plastic material adapter is designed for low voltage use and has a compact design that is easy to install. This product is a reliable and efficient solution for extending the power source for your Ecobee thermostat.

Open box, never used.