Kidde i4618AC Battery Backup Firex Hardwire Ionization Smoke Detector Firex smoke detector AC/DC Brick-red Color | nonflammable | provides a fireproof acoustic seal This is manufactured in China Red LED flashes until reset for quick, clear identification of initiating smoke alarm in interconnected system Visible low battery indicator helps locate chirping unit Front loading battery door makes battery changing simple, power link tab makes installation faster False alarm control quiets unwanted alarms for up to 8 minutes Interconnects with other compatible Firex smoke alarms and heat alarms