Google GVNZ4 Nest Power Connector
C-wire substitute for Nest Thermostats
Works with the Nest Thermostat, Nest Thermostat E and 3rd gen Nest Learning Thermostat
Please note, this works with 24 VAC systems ONLY. Millivolt and high-voltage systems are incompatible
Sealed in package
In brand new condition
See pictures for details