OMS-M13 Pro NFC Bluetooth Audio Adapter Bluetooth 5.3 Receiver And Transmitter 2 In 1 1. Support one transmitter and two receivers, can be connected to two bluetooth playback devices at the same time to use 2. Bluetooth 5.3 chip design, compatibility and stability is stronger 3. Bluetooth receiver bluetooth transmitter 2-in-1 design 4. Equipped with high-definition LED digital display screen, full-screen display of the working status and Bluetooth mode is clearly visible 5. Built-in digital signal to analog chip, support for digital fiber optic, coaxial, AUX, RCA interfaces 6. Wireless NFC sensor function, cell phone contact to connectiondisconnection 7. Cool RGB colorful light, multi-color adjustable, soft and not blinding 8. 1000mAh rechargeable high-capacity lithium battery, full of about 1.5h, about 10-12 hours of continuous listening, standby about 30 days 9. Support USB ((U disk) playback and launch, support a variety of lossless format audio file playback 10. Built-in high-definition microphone, support for wireless listening, hands-free communication, navigation 11. Simple connection, without any driver and download APP Parameters: 1. Bluetooth version: bluetooth V5.3 2. Support protocol: RX: A2DP AVRC TX: A2DP 3. Working frequency band: 2.402GHz -2.480GHz 4. Sensitivity: -85dBm less than 0.1 percent BER 5. Signal-to-noise ratio: greater than or equal to 90dB 6. Distortion: less than or equal to 0.1 percent 7. Interface type: Input: 3.5mm AUX + RCA + optical + coaxial + USB; Output: 3.5mm AUX + RCA 8. Optical parameters: support for optical input, sample rate support 3244.14896192KHz, 24bit 9. Support format: MP3WAVWMAAPEFLACM4AALACAMR 10. Screen size: 25 x 10mm LEDs 11. Operating current: less than 40mA 12. Built-in battery: 3.7V1000mAh (3.7W) 13. Charging current: about 1000mA 14. Charging time: about 1.5 hours 15. Battery life: RX about 10H, TX about 10-12H 16. Bluetooth distance: 10-20M (without obstacles) 17. Charging method: Typ