... 4G dual-channel receiver 3.upgrad original audio system wireless transmitter receiver(power pro audio)Feature/Function:1.It is built ... . 2.It has more than 1000 channels.3.The transmitter could connect with receiver only in 3seconds.4.2.4G ... 2dBaudio sampling rate32KHzDistortion1%channel spacing5MHzpower supplyAC 220V±10%/50HzMORE PICTURES:transmitter:PAYMENT:L/C,T/T,WESTERN UNION,ALIPAY,ESCROW is ...