About This HQRP® Replacement AC Adapter; ETL Listed; Fix no-C-wire & low-battery issues — delivers constant 24V AC to power smart thermostats and video doorbells for stable, always-on performance; Input: 120V AC; Output: AC 24V, 300mA; 25ft Cable; Wide compatibility — compatible with Ecobee ecobee3 ecobee4, Google Nest Learning & E, Honeywell T5 T9, Emerson Sensi; Ring 2020 3 4 Pro Pro2, Wyze, Blink, Eufy, Skybell, Arlo (wired); Safety Features: High Efficiency and Reliability; Automatic Overload cut-off; Stable, quiet output — 120V AC input to 24V AC 300mA with low interference & noise to prevent resets, dropouts, or erratic chimes; Automatic Thermal cut-off; Short circuit and Over Voltage protection; Low Interference & Noise; 1 Year warranty! Safety you can trust — ETL listed with automatic overload & thermal cut-off plus short-circuit and over-voltage protection; Compatible With Ecobee Google Nest Honeywell Emerson Ecobee4 Smart WiFi Thermostat, Wyze Ring Blink Video Doorbell C-Wire, 25ft Cable; C Wire Adapter Compatible with Ecobee Nest Honeywell Emerson Ecobee4 Smart WiFi Thermostat C-Wire, 25ft Cable; Fast install anywhere — 25 ft non-polarized white cable routes from outlet to device; plug-in or hardwire leads to terminals for a clean, reliable setup; Overview Brand : HQRP Power Source : Corded Electric Mounting Type : Cable Mount Current Rating : 0.3 Amps Specification Met : ETL