... easy to avoid interference frequency: the product work in the 2.4GHz of the ISM (ie industrial, scientific, medical) band, ... ; In order to avoid the interference in the 2.4GHz band and the effects of interference on the sound ... avoid receiving the wrong audio data7, work in the 2.4GHz ISM band, 20 working frequency point (can provide ... , Security Project in the audio transmissiond, fire radio system