The Ring Smoke & CO Listener is a Z-Wave Plus (500 Series) peripheral that functions as a digital signal processor (DSP) array. Unlike standard detectors, it does not possess smoke-sensing chambers; instead, it is tuned to the specific 3100Hz frequency patterns of UL-listed T3 and T4 alarm signals. Z-Wave S2 encryption protocols are utilized to provide secure communication between the listener and the Ring Alarm Hub. Power is provided by a 3V CR123A lithium battery, which supports a 250-foot line-of-sight range within the mesh network.
Technical specifications indicate that the device must be mounted within a 3-to-6-inch radius of an existing alarm's siren to ensure frequency isolation. The hardware-level filtering is designed to ignore non-emergency household noises, such as television audio. Functional status is monitored through periodic heartbeat polling, with the battery typically requiring replacement every 2 to 3 years depending on network traffic.
Support for professional monitoring is available when integrated with a compatible subscription, allowing the listener to trigger emergency dispatch upon hearing a legacy alarm. The system architecture is hub-centric, meaning the device cannot establish a direct connection to Wi-Fi networks without the central controller.
The Ring Alarm Smoke & CO Listener with App Alerts serves as an alternative for property owners who wish to modernize existing hardwired alarm systems without replacing the physical sensor nodes.
This specialized acoustic sensor is classified under alarm system sensors due to its role as a network bridge for legacy hardware.
