Features: Equipped with 1pcs omnidirectional dual-condenser mic, can pick up natural and clear sound within 6 meters from 360°. Built-in 1pcs 4Ω 8W speaker, can be a loudspeaker in meeting of 5-20 people. The highly efficient and intelligent DSP chip eliminate echo, reduce noise and support ALC function. Support Hi-Fi mode, speaker mute, mic mute and control, with light indicator showing status. Compatible for Windows / / iOS / Android system, can be connected to laptop, computer, tablet, smartphone. Support USB wired & 2.4G wireless connecting mode; Driver free, easy to operate. Under wireless mode, the built-in 2500mAh rechargeable battery can last for 8h. Work with communicating software such as QQ, Skype, Wechat, MSN, Sina , video conference software & so on. Suitable for all occasions, including video conference, online teaching, online interview, multi-party remote communication & etc; You can talk while listening. Specifications: Connection: 2.4G Wireless / Wired Sampling Frequency of Speaker: 24Khz~48Khz Sampling Frequency of Mic: 16Khz Speaker: 4Ω 8W Mic Type: 1pcs Omnidirectional Dual-Condenser Mic -Sensitivity: -34 ±3dB -Frequency: 100~10000Hz -Impedance: ≤2.2KΩ -SNR(Signal Noise Ratio): ≥58dB -Max. Sound Pressure Level: 115dB -Max. Current Consumption: ≤0.5mA Echo Cancellation: Max. 256ms Reverberation Time: ＜0.5s Product Noise: ＜48dBA Audio Processing: AEC/AGC/NR/NLP/ALC System Environment: Compatible for Windows 8/7/VISTA/XP/2000, For 10.5 / iOS / Android Interface: 3.5mm Audio Input for Mic, 3.5mm Audio Output for Loudspeaker, Phone Audio Port, USB Port USB Cable: DC 5V 500mA, 3 meter long Built-in Battery: 3.7V 2500mAh Operating Voltage: 4.5~5.5V Item Size: 34 * 34 * 4.3cm / 13.4 * 13.4 * 1.7" Item Weight: 703g / 1.54Lbs Package Size: 40.5 * 34.5 * 9.4cm / 15.9 * 13.6 * 3.7" Package Weight: 1487g / 3.3Lbs Package List: 1 * Conference Microphone Speaker 1 * Wireless Receiver 1 * USB Cable 1 * Audio Cable 1 * Quick Start Guide (English)