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 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.Specifications:Speaker Sampling Frequency: 24Khz~48KhzMic Sampling Frequency: 16KhzSpeaker: 4Ω 8WMic: 5pcs Unidirectional Dual-condenser Mic -Sensitivity: -36 ± 3dB -Frequency: 100~10,000Hz -Impedance: ≤0.68KΩ -SNR: ≥58dB -Max. Sound Pressure Level: 110dB -Max. Current Consumption: ≤0.5mAEcho Cancellation: Max. 256msReverberation Time: ＜0.5sProduct Noise: ＜48dBAAudio Processing: AEC/AGC/NR/NLP/ALCExtended Mic Sensitivity: -30 ± 3dbExtended Mic Interface: RJ11Extended Mic Cable Length: 2.4mUSB Cable: DC 5V 500mA, 5m longSystem Environment: Compatible for Windows 8/7/VISTA/XP/2000, for / iOS / AndroidInterface: 3.5mm Audio Input for Mic, 3.5mm Audio Output for Loudspeaker/Earphone, Phone Audio Port, USB PortItem Size: 34 * 34 * 4.3cm / 13.4 * 13.4 * 1.7"Item Weight: 684g / 1.5LbsPackage Size: 40.5 * 34.5 * 14.6cm / 15.9 * 13.6 * 5.7"Package Weight: 1745g / 3.8LbsPackage List:1 * Conference Mic Speaker2 * Extended Mic2 * Extended Mic Cable1 * USB Cable1 * Audio Cable1 * Quick Start Guide (English)Note:Computer and smartphone are not included.