... talkie walkie talkie systems CE,FCC,ROHS watch walkie talkie OverviewTA-509 is a multi-2.4G digital wireless audio and video ... chip,with a little amount of external components, such as audio amplifier,microphone, speakers, etc. Also adopt industrial-level design standards ... , super operating capacity.4) With 12-bits digital audio signal serial input, DAC audio output port,the sampling rate is 8kbps.5 ...