... . Features1, the user can be pre-recorded 10 seconds alarm voice alarm voice broadcast.2, the host can set the time and timing ... deployment time.3, host on-site monitoring, intercom functions: Alarm may duplex intercom for field personnel.4, 16 wireless zones ... the surrounding zone, internal zone, 24-hour zone, sound alarm, silent alarm types for different occasions.5, cable zone (normally open, ...