Feature: 1. 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. 2. Built-in 4Ω 8W speaker, can be used as loudspeaker. 3. Built-in intelligent and efficient DSP can eliminate echo and reduce noise. 4. Support Hi-Fi mode, speaker mute, mic mute and volume control. 5. Usable for computer, tablet, smartphone, laptop; Driver free, plug and play. Support online video communicating software such as QQ, MSThoo, Skype, MSN \u0026 etc. Widely applied to video conference meeting, online teaching, online interview, multi-party communication, online chatting \u0026 etc. 6. Built-in 4Ω 8W speaker, can be used as loudspeaker.Support online video communicating software such as QQ, MSThoo, Skype, MSN \u0026 etc. 7. Built-in intelligent and efficient DSP can eliminate echo and reduce noise.Support Hi-Fi mode, speaker mute, mic mute and volume control. 8. Widely applied to video conference meeting, online teaching, online interview, multi-party communication, online chatting \u0026 etc. Specification: 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. Specifications: Speaker Sampling Frequency: 24Khz~48Khz Mic Sampling Frequency: 16Khz Speaker: 4Ω 8W Mic: 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: ≤0.5mA Echo Cancellation: Max. 256ms Reverberation Time: ＜0.5s Product Noise: ＜48dBA Audio Processing: AEC/AGC/NR/NLP/ALC Extended Mic Sensitivity: -30 ± 3db Extended Mic Interface: RJ11 Extended Mic Cable Length: 2.4m USB Cable: DC 5V 500mA, 5m long System Environment: Compatible for Windows 8/7/VISTA/XP/2000, for Mac / iOS / Android Interface: 3.5mm Audio Input for Mic, 3.5mm Audio Output for Loudspeaker/Earphone, Phone Audio Port, USB Port Item Size: 34 * 34 * 4.3cm / 13.4 * 13.4 * 1.7" Item Weight: 684g / 1.5Lbs Package Size: 40.5 * 34.5 * 14.6cm / 15.9 * 13.6 * 5.7" Package Weight: 1745g / 3.8Lbs Package List: 1 * Conference Mic Speaker 2 * Extended Mic 2 * Extended Mic Cable 1 * USB Cable 1 * Audio Cable 1 * Quick Start Guide (English) Note: Computer and smartphone are not included. Package List: 1 * Conference Mic Speaker 2 * Extended Mic 2 * Extended Mic Cable 1 * USB Cable 1 * Audio Cable 1 * Quick Start Guide (English) Note: Computer and smartphone are not included.