Kidde Dual Sensor AC Hardwired Interconnect Smoke Alarm

Protect your home and family with this easy-to-operate alarm. The Kidde® 120-volt AC hardwired dual sensor photoelectric smoke alarm includes a 9-volt backup and provides protection from both types of fires.
 
Features
Includes ionization and photoelectric sensors for maximum protection
Hush™ feature to quickly silence nuisance alarms
Tamper-resistant
Battery backup provides protection in case of power failure
9V battery backup included
Interconnectable with up to 24 devices (of which 18 can be initiating) including smoke, CO, and heat alarms
UL listed