Wireless and Wired Conference Microphone: Support BT and USB 2 connection methods, suitable for most device with bt function on the market. Compatible with most operating system of Android, Windows, MacOS and video conference applications. Full Coverage Voice Pick-up: built-in with 4 microphones, a hi-fi speaker, and available to connect with 2 extension microphones that can collect your voice from far away. 360° Omnidirectional microphone picks up voices from all directions, range of voice pick-up is up to 8 meters/26.2 ft radius. Background Noise Reducing Technology: It is integrated with ad-vanced 3A audio algorithm for echo cancellation, noise suppression, and gain control that will ensure your voice be heard clearly. Easy to Set and Use: Plug and play, use the 2m/6.5ft USB date cable connecting to computer, no need to install drivers. USB wired connection is stable. Stylish & Intimate Microphone: Mini and portable, dark grey fabric with smooth surface could more integrate with your office, meeting room or studio. Small enough to put in your pocket or backpack, convenient to carry around. Power supply: DC 5V Battery: Built-in 3000mAh battery Battery Life: 10hrs Built-in microphone: 4pcs Pickup Distance: 8m System: Compatible with most operation system of Android, Windows, Mac os and video conference applications. Colour:black Material:plastic Size:180 x 180 x 40mm Package Contents: 1 x Video Conference Speakerphone 1 x Type-C cable 1 x English manual 2 x 2meter Extension microphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.