All in One Compact Wall-Mounted Voice Evacuation System

● AB line speaker output of two zones, independent switch with master volume, treble and bass adjustment
● Support speaker line detection (light load, overload, open circuit and short circuit)
● One channel audio input, two-zone paging microphone, support offline detection
● Built-in primary and standby 240W digital amplifier module, auto switch to standby amplifier when the primary one breaks down
● Support AC/DC power supply, and AC/DC automatic

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