Fangrui Product Details 1. Yans Ys-m23 Usb Mini Port Video Conference Omnidirectional Microphone 2. Use Usb Driver-free Design, Built-in High-power Hifi-level Audio Speakers 3. 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 4. Built-in 3 Single-pointing High-sensitivity Double Condenser Microphones, 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 At Ease In A Multi-person Meeting. Position, No Need To Be Particularly Close To Or Move The Omnidirectional Microphone 5. Suitable For All Kinds Of Video Conferencing And Instant Messaging Software, Plug And Play 6. Built-in A 3.5mm Mobile Phone Audio Interface, You Can Connect The Mobile Phone With Ys-m23, It Is Very Convenient To Conduct Conference Calls; And Has Hifi Music Function, After Pressing The Hifi Button, The Speaker Immediately Switches To 48khz Mode, So That The Music Can Be Restored More Realistic 7. 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, Calculation, So That Software Video Conferencing Applications Can Be Obtained Clear And Clean Voice Communication Quality 8. Equipped With Intelligent Two-color Led Lights, Which Can Easily Display The Status Of Each Function 9. Compatible With Usb 1.0 & 2.0, Driver-free Design 10. Compatible System: Windows8windows7vistaxp2000mac10.5android 11. Speaker Sampling Frequency: 24khz-48khz, Microphone Sampling Frequency: 16khz 12. Operating Voltage: 4.5v-5.5v 13. Sensitivity: -40 +- 3 Db 14. Frequency: 100-10,000 Hz 15. Output Impedance: Less Than Or Equal To 2.2 Kiloohms 16. Sound Pressure Level: 115db 17. Signal To Noise Ratio: Greater Than Or Equal To 58db 18. Size: 325x340x64mm, Weight: 680g