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School Broadcast System-20Ch. Analog School Broadcast System Feature:One way School Broadcast SystemSingle wire solution connects Speaker to Speaker.(Savings of lot wire & money)1. One to one room call announcement.2. Group Call rooms (eg. 10-20 room,15-24 rooms, Select groupannouncement)3. Selected Call rooms (eg. 02,05,09,12,16,21,30 call announcementall selected room.)4. All call announcement all rooms.7. No need of amplifier.8. Mobile direct connect with Bluetooth play sound and music liveall class room and Pendrive,FM , SD card can connect livemusic,prayer,song live to all class rooms.9. Power saving mode cut off power automatic.10. Wire connection easy. Connect wire speaker to speaker andso