... for better sound quality wireless flat art backgound music speaker,super slim speaker,Hifi sound quality,smart home,broadcast,hospital,wireless ... be fixxed on the wall easily. 3.Multimedia function,2 ways from public source, 2 ways local source. 4.Support SD/MMC/ ... adjustable by PC or emitter. 3.using 2.4G module transmit the audio signal,the maximum effecive distance is 30M(effecting ...