Early Alert Smoke Alarm Signal Extender - Receiver Speaker

Receiver/Speaker works with Sound Sensors to simultaneously sound the alarm triggered by any smoke detector in the home INSIDE a bedroom, even with the door closed.  Add one to each bedroom in your home to ensure every family member receives an early warning. The optional voice recording feature is recommended for families with small children.  Record a parent's voice for a more effective wake-up warning for children under age 12.