Fangrui Product Details 1. Yans Ys-m31l 2.4g Video Conference Wireless Omnidirectional Microphone 2. Full-duplex Voice Call Clear Technology, 360-degree Pickup Without Dead Ends, Cascaded Pickup Distance Up To 8 Meters, Recommended Use Distance Within 6 Meters. 3. 1+1 Wireless Microphone Cascade, 2 Microphones Are Transmitted Through A Wireless Receiver, And The Speaker Volume, Microphone Volume, Mute And Other Functions Of A Single Microphone Can Be Separately Controlled. 4. Adopt 2.4g Wireless Transmission Technology, No Interference Wireless Transmission Above 10m, Longer Transmission Distance, Wider Transmission Bandwidth, And More Stable Transmission Signal. 5. It Can Be Controlled By The Remote Control Of The Conference Camera, And The Conference Mode And Music Mode Can Be Switched Freely By Using The Remote Control. 6. The Machine Can Be Charged Through The Usb Interface, Providing 1ah Fast Charging, And Can Work Continuously For 12 Hours. 7. Equipped With Intelligent Two-color Led Lights, Which Can Easily Display The Status Of Each Function, Such As Power, Volume, Mute, Etc., And Can Intelligently Prompt The User To Charge. 8. Six Body Buttons: Volume Up, Volume Down, Microphone Mute, Speaker Mute, Mic Selection, Power Switch, Convenient For Users To Operate. 9. Support External Earphone Or Speaker Device With Power Amplifier. 10. Sensitivity: -22dbfs 11. Signal To Noise Ratio: 60db 12. Frequency Response Range: 20hz-15khz 13. Echo Cancellation: 256ms 14. Sampling Rate: 16khz48khz 15. Use Interface: Usb2.0 Type A 16. Transmission Mode: 2.4g Wireless Transmission 17. External Output Interface: 3.5mm Headphone Jack 18. Charging Port: Mini Usb 19. Power Adapter:dc5v+-0.2v, 1a 20. Charging Time: About 4 Hours, Usage Time: About 12 Hours 21. Standby Time: 3 Months 22. Dimensions: 178x162x47mm 23. Weight: 940g