With independent zone switches for quick control of the 6 zones of the amplifier.With signal level indication function for more intuitive paging volume.. With key lock function. One chime tone with a descending tone. With dual RJ45 interfaces for zone control and override functions. When cascading paging stations with a single port, the mixer amplifier can support up to 6 paging stations on a single port, with a maximum transmission distance of 300m. If only one paging station is connected to the mixer amplifier, the transmission distance can be up to 600m. The paging microphone does not require a separate power adapter and it is powered and receives audio transmission from the DMA series 6-zone amplifier. Note: Each host supports a maximum of 6 remote paging microphones. With 1-channel microphone volume adjustment.With one-touch all-zone paging function.With anti-fingerprint coating for the touch panel.