Fangrui Product Details 1. M16 Pro Nfc Fiber Optic Bluetooth Receiver And Transmitter 5.1 Audio Adapter 2. Designed With Bluetooth 5.1 Chip For Better Compatibility And Stability 3. Bluetooth Receiver, Bluetooth Transmitter 2-in-1 4. Equipped With High-definition Led Digital Display, The Working Status And Bluetooth Mode Can Be Clearly Seen 5. Built-in Dsp Decoding Chip, Heavy Bass Effect, Support Three Gain Adjustable 6. Nfc Function, Cell Phone Induction Contact To Connection 7. Controllable Indicator Light, Soft And Not Blinding, The Brightness Of The Light Follows The Volume Level Accordingly Brighten Darken 8. Built-in 1200mah Rechargeable Lithium Battery, About 8 Hours Of Continuous Listening, Battery Life Up To 30 Days 9. Support U Disk Tf Card Playback And Launch, Support Mp3 Wma Sbc Wav Dts A52 Flac Aac Aif Amr Ape Formats 10. Support 5-8 Meters Infrared Remote Control, Modesignalvolumeupdown Songmixmicrophone And Other Various Operations 11. Built-in 6.5mm High-definition Microphone, Support For Microphone Access Singing, Built-in Anti-whistling Design 12. Simple Connection, Without Any Driver And Download App 13. Parameters: 14. Bluetooth Version: Bluetooth V5.1 15. Support Protocol: A2dpavrcphfpsbc 16. Working Frequency Band: 2.402ghz -2.480ghz 17. Power Level: 2 Levels 18. Sensitivity: -85dbm Less Than 0.1 Percent Ber 19. Signal-to-noise Ratio: Greater Than Or Equal To 90db 20. Distortion: Less Than Or Equal To 0.1 Percent 21. Interface Type: Input: 3.5mm Aux + Rca + Usb Flash Drive + Tf Card + 6.5mm Microphone + Digital Optical Fiber + Digital Coaxial; Output: 3.5mm Aux + Rca 22. Support Format: Mp3wavwmaapeflacg729m4aalacamrdtsmidig726mty 23. Built-in Battery: 3.7v1200mah 24. Charging Current: About 1000ma (max) 25. Charging Time: About 1.5 Hours 26. Endurance: Rx About 8h, Tx About 8h 27. Bluetooth Distance: Less Than Or Equal To 30m (open Space) 28. Charging Method: Type-c 5v1a 29. Size: 98 X 67 X 24.2cm 30. Weight: 120g