Main features Microphone type Table microphone Microphone frequency 50 - 20000 Hz Orientation of integrated microphone Omnidirectional microphone Mute circuit Yes Connections and interfaces Transmission technology Wired & Wireless device interface 2.5 mm (2/32") Microphone input Yes Radio frequency 1880 - 1900 MHz Powers Product color Black On/Off switch Yes Energy source Battery type Integrated battery/battery technology Lithium polymer (LiPo) Battery