1. Use USB driver-free design, built-in high-power mid-woofer speaker 2. 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, no dead spots for radio within 20-30 square meters, one person can walk around freely during a meeting, and when a multi-person meeting, everyone can sit in their own position at ease without being particularly close or Is a mobile 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 of high-quality 16K-24K audio sampling and calculation, allowing software video conferencing applications Can get clear and clean voice communication quality 5. Suitable for all kinds of video conferencing and instant messaging software, plug and play 6. The design of hands-free speaker microphone makes it easier for users to participate in software video conferences or use instant messaging software 7. Operating voltage: 4.5-5.5V 8. Sensitivity: -34 +- 3 dB 9. Frequency: 100-10,000 Hz 10. Output impedance: less than or equal to 2.2 kiloohms 11. Signal to noise ratio: greater than or equal to 58dB 12. Sound pressure level: 95dB 13. Current consumption: less than or equal to 0.5mA 14. Echo cancellation: 256ms 15. Audio processing: AECAGCNRNLPALC 16. Working humidity: -20-90% 17. Dimensions: 210 x 193 x 43mm 18. Weight: 425g 19. Cable length: 3m 20. Support system: Windows8windows7vistaxp2000Mac10.5Android