UF6 smart creative u-segment microphone has longer wireless transmission distance, built-in 670 mAh polymer battery with long life, synchronize karaoke without interference, freedom to adjust the volume, widely used for teaching / tour guide / sales promotion / lectures / meetings / karaoke and so on. It has >164ft / 50m working distance, 100Hz - 20KHz frequency response, 2.2kΩ standard impedance, -38dB ± 2dB sensitivity, FM modulation system.