ELK Products ELK-M1TWI Two Way Listen-In Interface For ELK-M1Gold
Adds up to three (3) zones of two way listen-in to M1 Gold 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.
ELK Products ELK-M1TWS M1 Two Way Speaker/Microphone
Microphone and 20 Watt Speaker combination for use with the ELK-M1TWI and ELK-M1EZ8TWI Two Way Listen-in interfaces. Requires 4 conductor cable. Up to 12 may be connected.
