FIRST ALERT JARDEN Digital 10-Year CO Alarm provides reliable carbon monoxide detection for your home or office. This hardwired detector features a digital display for easy monitoring and a 10-year sealed battery backup, ensuring continuous protection without frequent replacements. The alarm sounds a loud alert when dangerous CO levels are detected, helping safeguard your family from this odorless, colorless gas. UL-listed and designed for dependable performance, this detector is an essential safety device for any property with fuel-burning appliances.