Fangrui Product Details 1. Yans Ys-m21 Usb Mini Port Video Conference Omnidirectional Microphone 2. . Using 256ms Echo Cancellation Algorithm, Built-in Voice Automatic Gain Balance (alc) Function, No Matter How Far Away The Speaker Is, The Sound Can Be Picked Up Clearly 3. 360-degree Omnidirectional High-sensitivity Dual-capacitor Microphone, Effective Diameter Of 6-12 Meters, No Dead Spots Within 20-60 Square Meters, Free To Walk Around When One Person Is In A Meeting, And Everyone Can Sit In Their Own Place At A Multi-person Meeting No Need To Get Close Or Move The Omnidirectional Microphone 4. Built-in High-performance Intelligent Dsp Chip, Input And Output Audio Directly On The Chip For High-speed Calculation Processing, Not Only Can Effectively Block Noise, Eliminate Echo, High-speed Processing 16k-24k Audio Sampling And Calculation, So That Software Video Conferencing Applications Can Be Obtained Clear And Clean Voice Communication Quality 5. The Design Of Hands-free Speaker Microphone Makes It Easier For Users To Participate In Software Video Conferences Or Use Instant Messaging Software 6. Compatible With Usb 1.0 & 2.0, Free Drive Design 7. Speaker Sampling Frequency: 24khz 8. Microphone Sampling Frequency: 16khz 9. Operating Voltage: 4.5v-5.5v 10. Sensitivity: -34 +- 3 Db 11. Microphone Frequency: 100-10,000 Hz 12. Output Impedance: Less Than Or Equal To 2.2 Kiloohms 13. Signal To Noise Ratio: Greater Than Or Equal To 58db 14. Sound Pressure Level: 115db 15. Compatible System: Windows8windows7vistaxp2000mac10.5android 16. Size: 325x340x64mm, Weight: 650g 17. Cable Length: 5m 18. Packing List: Omnidirectional Microphone, Usb High-speed Audio Cable, Manual, Certificate Of Conformity, Warranty Card