If you would like to have the ability to monitor an elderly relative remotely or give a central station the ability to converse back and forth through the alarm panel, then you can connect the M1TWI into your M1 Gold control and easily have the ability to do both. This gives you the option of having three zones of 2-way listening.
Specifications:• Requires ELK-M1TWM or M1TWS Microphones
• Operating Voltage: 12 Volts D.C.
• M1TWI Board Current Draw: 10mA
• Microphone Current Draw. 5mA each
• Housing Dimensions: 4.375" x 3.0" x 1.125"
• Circuit Board Dimensions: 3.5" x 2.75