Bai Reiths Conference Meeting Omni-Directional Microphone Active Noise Echo Canceling with USB Drive Free Connection Full 360 Degree Omni-directional, Turn any location into a conference room, 20-30 Square Meters room no Working Blind Spot. Outstanding sound quality even in noisy environments, Built-in Advantage DSP Echo Cancellation, Active Noise Reduction and Full Duplex Communication. Hi-Fi Levels AMP and Speaker. No external power required, Compatible with USB1.0/2.0/3.0, USB Drive Free Connection, Omni-Direction and Support PnP USB. Build in High Efficiency Intelligent 16Bit-DSP Chip. IN-put and OUT put are High Speed Processing Directly on the Chip. High Speed Processing 16K High Quality Audio Sampling, Operation, Let all kinds of Software can get the Clear, Clean High Quality Voice Communication. The Speaker and Microphone Hands Free design can make the User to Participate in Video conferencing software or using instant messaging software more easily The Speaker volume output can totally meet the 10-18 persons meeting requirement. The Microphone support a 3.5mm Stereo Plug to connect an extra Headphone.