This First Alert Wireless Integrated Smoke Alarm System is battery operated and comes in a convenient twin pack and includes training DVD. Easily link your alarms together with the press of a button. When one of the alarms sound; they all sound for maximum whole home protection. Photoelectric smoke sensor reduces nuisance alarms from cooking smoke or shower steam. Easy access battery drawer: no need to remove alarms from ceiling to change batteries. 10-year limited warranty. Meets UL standards.
* This product is intended for non-professional do it yourself installation. If you would like information about a professionally installed and monitored system, please contact First Alert Professional at 1-800-921-6025. First Alert Professional is not affiliated with BRK Brands, Inc.