The X35 is a high quality wireless microphone with UHF frequency, with 100M foot range. - Can connect with mixer and karaoke amplifier, use the jack to jack cable (included in this package )- Dual channel receiver, totally 8 frequency group. -sound filter, fully eliminate the interference signal.- Output digital volume control, high fidelity audio output, wide power supply range  (9v-12v)- Built-in battery management module circuit, protect battery from damage. -Using quartz shake circuit, has a high stable performance to the frequency. - Using audio compression-extension technique, reduce noise, dynamic range increase. -Selectable excellent chip and High quality components, make the matching quality and very good. - The two microphones can work at the same time.