The frequency range of mic-320 is vhf200-270mhz, uhf700-830mhz and uhf700-830mhz respectively. What is the frequency stability? The dynamic range > 90DB,FM modulation, frequency response of 50hz-16khz, =90DB signal-to-noise ratio, neighborhood interference ratio and mirror interference ratio are all =80DB, which are used at =80DB (open area). The receiver is powered by transmission power of DC15V ~ 18V,90V One Charg.