First Alert Wireless Interconnect Smoke & Carbon Monoxide Alarm

* Brand new in sealed boxes. * I am selling 4 of these. * Wireless Interconnect: Communicates with other First Alert wireless alarms * Exclusive Talking Alarm: Tells you type and location of danger * Battery Powered * Photoelectric: Sensor stops most false alarms * Comes with batteries; however, you still might need to replace them. (TUB 2)