Smoke and Carbon Monoxide Alarm

First Alert 1039839 Smoke and Carbon Monoxide Alarm, 85 dB, Electrochemical SensorFirst Alert series of wireless talking battery operated smoke and CO alarms effectively eliminates the need for a wired connection and operates entirely on batteries. The latest advancement in a series celebrated for its intuitive use of technology, the first alert wireless interconnect collection offers an abundance of options when it comes to creating the ideal safety network. Wirelessly inter-connectivity allows you to connect up to 16 alarms within your home! Voice can easily be programmed for alarm's location within your home. (this feature comes with 11 pre-programmed choices) Voice also notifies which hazard is being detected. If the alarm set in your kitchen senses smoke, all of your first alert wireless interconnect alarms will announce 'Warning, evacuate! Smoke in the Kitchen!'. This feature allows for the maximum in whole home protection. first alert wireless interconnect talking battery operat