OMS-M3 Bluetooth 5.1 Audio Adapter Speaker Amplifier Receiver 1. Adopt bluetooth 5.1 chip design, stronger compatibility and stability 2. NFC function, cell phone one-touch connection 3. Cool breathing light, signal source indicator is clearly visible, soft and not blinding 4. Built-in 500mAh rechargeable lithium battery, up to 10 hours of continuous listening to songs 5. Support USB (U disk) and TF card playback 6. Support 5-8 meters infrared remote control, a variety of functions at once 7. Built-in high-definition microphone, support wireless listening to songs, hands-free communication, navigation 8. Simple connection without any driver or APP download Parameters: 1. Bluetooth version: bluetooth V5.1 2. Support protocol: A2DP AVRC 3. Working frequency band: 2.402GHz -2.480GHz 4. Power level: 2 levels 5. Sensitivity: -85dBm less than 0.1 percent BER 6. Signal-to-noise ratio: greater than or equal to 90dB 7. Distortion: less than or equal to 0.1 percent 8. Interface type: input: BT + USB + TF interface; output: 3.5mm AUX + RCA 9. Support format: MP3WAVWMAAPEFLACG729M4AALACAMRDTSMIDIG726MTY 10. Screen size: 36 x 8mm 11. Operating current: less than 40mA 12. Built-in battery: 3.7V500mAh 13. Charging current: about 500mA 14. Charging time: about 1.5 hours 15. Listening time: about 10H 16. Bluetooth distance: less than or equal to 20m (open space) 17. Charging method: Micro USB 5V0.5A 18. Size: 98 x 67 x 23mm 19. Weight: 120g Packing list: host + Type-C charging cable + 3.5mm audio cable + red and white RCA lotus cable + infrared remote control + instructions