The NEW SEALED Ring Smoke/CO Listener is a 1st Generation smoke and carbon dioxide detector that operates on a battery power source. It is white in color and has a diameter of 3 inches. Manufactured in 2018 by System Sensor and sold by Ring, this unit features real-time mobile phone and tablet alerts, as well as phone alerts. It is compatible with Amazon Alexa and Ring Alarm for enhanced home security. With its Z-Wave smart home protocol, this smoke/CO listener provides added safety and convenience for households looking to improve their home improvement and security measures.