OMS-M13 NFC Bluetooth Audio Adapter Bluetooth 5.3 Receiver And Transmitter 1. Bluetooth 5.3 chip design, compatibility and stability is stronger 2. Bluetooth receiving, Bluetooth transmitting two-in-one design 3. Receiving mode upgraded one to two, can be connected to two cell phones at the same time to listen to songs 4. Equipped with high-definition LED digital display screen, full screen display working status and Bluetooth mode is clearly visible 5. Built-in digital signal to analog chip, support digital fiber, coaxial, AUX, RCA interface 6. Wireless NFC sensor function, cell phone connectiondisconnection at the touch of a button 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 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; distortion: less than or equal to 0.1 percent 6. Interface type: input: 3.5mm AUX + RCA + optical + coaxial + USB; output: 3.5mm AUX + RCA 7. Optical parameters: support for optical input, sample rate support 3244.14896192KHz, 24bit 8. Support format: MP3WAVWMAAPEFLACM4AALACAMR 9. Screen size: 25 x 10mm LEDs 10. Operating current: less than 40mA 11. Built-in battery: 3.7V1000mAh (3.7W) 12. Charging current: about 1000mA 13. Charging time: about 1.5 hours 14. Battery life: RX about 10H, TX about 10-12H 15. Bluetooth distance: 10-20m (without obstacles) 16. Charging method: Type-C 5V1000mA 17.