120-Volt AC Hardwired Combination Smoke and Carbon Monoxide Alarm with Battery Backup Contractor (6-Pack)

The BRK hardwired combination smoke and carbon monoxide alarm features ionization smoke sensor and electrochemical CO sensor. It uses 120-Volt AC power and comes with 9-Volt alkaline battery backup. It carries a 10-year limited warranty.|Hardwired 120-Volt AC smoke and CO alarm with 9-Volt alkaline battery backup|Ionization smoke sensor, electrochemical CO sensor|Latching alarm indicator remembers which unit initiated the alarm|Audible end of life signal|10-year sensor and alarm life|Silence feature