VTech VC7151-109 DECT 6.0 Cordless Telephone with Wireless Monitoring System, Garage Door Sensor, and Open/Closed Sensor for Doors or Windows Easy to Install Cordless Telephone with Wireless Home Monitoring Capabilties Receive alerts on the handsets and base when your garage door is up or down The open/closed sensor allows you to keep tabs on areas like doors, cabinets and windows, and receive an alert when they open or close A fully-featured telephone with built-in answering system, caller ID and 22 minutes of recording time This system is expandable up to 5 cordless handsets and 400 sensors