... Features1, the user can be pre-recorded 10 seconds alarm voice alarm voice broadcast.2, the host can set ... zone, internal zone, 24-hour zone, sound alarm, silent alarm types for different occasions.5, cable zone ( ... .9, the host group alarm messages can be stored user number 5.10, the host can be ... stored 5 groups, a telephone number users.11, host a group message can be pre-set alarm ...