Smart smoke & carbon monoxide alarm featuring built-in Alexa Voice Services. Plays music and audio books, reads the news, controls smart-home devices, and more. Installs on the ceiling to fill any room with immersive, 360-degree high-end audio. Advanced microphones with noise cancellation technology allow the device to hear any request even while playing music. Compatible with Apple HomeKit. 2-in-1 alarm detects smoke and carbon monoxide. Alerts you to the danger and location with an 85-decibel alarm. Notifies smart phone if there is a smoke or carbon monoxide emergency in the home. Installs like a standard hardwired smoke alarm to easily replace existing alarms. Adapter plugs are included to eliminate rewiring, makes installation easy. Includes battery back-up, battery life varies according to use and application.