1.The LCD shows microphone ON/OFF condition and control dynamic level and   volume.
    2.Built-in hi-fi speaker 8 Ω 2 w Ф 60 mm, for conference room amplification   and play the background music, electronic switch control volume.
    3.Built-in high fidelity capacitor sound head, its sound quality is good   and low noise,it has strong pickup distance.
    4.The annular red indicator lamp can show the working state on   microphone.