Hotop 24 Volt Transformer, 16.5ft Long C Wire Adapter Thermostats Compatible with Most Versions of Ring Doorbell and Smart Thermostat, Nest Hello Skybell Eufy Wyze and Nest Ecobee Sensi Honeywell;

Specification:
Input voltage: 120 V/AC, 60 Hz;
Output voltage: 24 V, 0.3 A/ AC
Length: 23 feet/ 7 m
Compatible with: devices that require 24 volt current for operation, such as smart thermostats of Nest, Honeywell, Ecobee, Hive, Emerson Sensi, etc.

Package includes:
1 x 24 Volt adapter

Please note:
This is a compatible spare part and the manufacturers' names has been mentioned above for reference purposes only.