U-620 Professional 1 to 2 Waistpack Wireless Headset Microphone System 1. Frequency range: 530.0MHZ~989.0MHZ 2. Transmitting power: less than 10mW 3. Dynamic range: greater than 100dB 4. Comprehensive distortion: less than 0.5% 5. Frequency response: 30-18KHZ 6. Receiving sensitivity: less than -105dbm-+12dB SINAD 7. Power supply voltage: DC9V-13.5V 8. Frequency range: 640-695MHz 9. Dynamic range: greater than 90dB 10. Comprehensive distortion: less than 0.3% 11. Delay: less than 3ms 12. Audio signal-to-noise ratio: greater than 85dB 13. Frequency response: 30-18KHz 14. Receiving sensitivity: less than -105dBm 15. Receiving distance: 50-100 meters 16. Working voltage: AA1.5V battery x2 =3V 17. Working current: 100-120mA 18. Frequency range: 640-695MHZ 19. Frequency error: less than 15ppm 20. Emission rate: 11-15dbm 21. Frequency response: 30-18KHZ 22. UHF high frequency band FM, infrared frequency matching 23. One-to-two FM, 2x100 channels 24. High-definition LCD display, fiberglass surface, high-end clarity 25. Brushed metal panel, receiver and handheld transmitter use durable metal shell, durable and scratch-resistant 26. Standard 1U chassis, convenient for engineering installation and debugging 27. Ideal use distance of about 50-100 meters 28. Dual antenna reception, with 1 6.5 output and 2 Caron balanced outputs, suitable for connecting various external devices 29. Less transmission delay, long transmission distance, fully integrated chip solution, stable product performance 30. It has a wide range of applications and is used in home theaters, KTV rooms, conferences, high-end clubs, school teaching, hall performances, meeting rooms of enterprises and institutions, and many other places.