1, quartz PLL frequency synthesizer

1, built-in 4 kinds of clear and swee..

1, microphone extender In the paging ..

1, with 16 intelligent control signal..

 This device offers two modes of..

 1, when power is turned on, the..

 1, with automatic / manual broa..

 1, the audio matrix can switch ..

1, 2 groups broadcast background soun..