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Features: Three built-in dual-condenser unidirectional mic, pick up crystal clear sound from 360 within 8m. Two extended mic is designed for long conference table. Built-in 4Ω 8W speaker, can be used as loudspeaker. Built-in intelligent and efficient DSP can eliminate echo and reduce noise. Support Hi-Fi mode, speaker mute, mic mute and volume control. Usable for computer, tablet, smartphone, laptop; Driver free, plug and play. Support online video communicating software such as QQ, MSThoo, Skype, MSN etc. Widely applied to video conference meeting, online teaching, online interview, multi-party communication, online chatting etc.