Fangrui Product Details 1. Debra Emx-1 Xlr Adapter Portable Wireless Monitor System Transmitter & Receiver 2. Uhf Fm, One-touch Switching Between 16 Kinds Of Frequencies, Automatic Matching. 3. Low Signal Transmission Latency, Stable And Reliable, With An Effective Range Of Up To 30 Meters. 4. Built-in Rechargeable Lithium Battery, Provides 6-8 Hours Of Continuous Use. 5. Mini Monitoring System, Practical And Portable. 6. Equipped With Comfortable Headphones, It Isolates Noise And Provides Clear Vocals. 7. The Transmitter Supports Connection To Sound Cards, Microphones, Musical Instruments, Etc. 8. Technical Specifications 9. Frequency Range: 560-590mhz 10. Latency: 4.5ms 11. Adjustable Channels: 16 12. Channel Spacing: 0.5-2.5mhz 13. Modulation: Digital 14. Frequency Stability: +3ppm 15. Frequency Response: 40hz-20khz 16. Signal-to-noise Ratio: 94db 17. Operating Range: 30m (up To 50m In Optimal Conditions) 18. Battery: 3.7v 1000mah 19. Package Included: 20. Transmitter X 1 21. Receiver X 1 22. 5mm To Xlr Adapter X 1 23. Usb Cable X 1 24. Earphones X 1 25. User Manual X 1 26. Storage Bag X 1