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For use with the ELK-M1 Security, Automation & Phone Control System. The ELK-M1TWI Adds up to three (3) zones of two way listen-in to M1 or M1G Control. This can be used by the Central Station to verify an alarm, or by a user from the telephone remote control to check on elderly parents, children, etc. Up to 12 microphones (M1TWS) may be connected.
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The Smartest DIY Home Improvements
