M9 Pro 5.1 Bluetooth Receiver Launcher FM Radio 4 In 1 NFC Audio Adapter 1. Bluetooth version: Bluetooth V5.1 2. Support protocol: A2DPAVRCPHSPOPPGATTSM 3. Operating band: 2.402GHz - 2.480GHz 4. Power level: Class 2 (Class II) 5. Sensitivity: -85dBm 6. Signal to noise ratio: 90dB and above 7. Interface type: - Input: 3.5mm AUX+RCA+FM+USB+TF interface+6.5 MIC - Output: 3.5mm AUX+RCA 8. Radio parameters: FM 87.5-108MHz 9. Supported formats: MP3WAVWMAAPEFLACG729M4AALACAMRDTSMIDIG726MTY 10. Screen size: about 36 x 8mm 11. Battery capacity: 3.7V1200mAh 12. Charging current: approx. 1A 13. Charging time: about 1.5h 14. Life time: about 8h 15. Bluetooth distance: within 30M (open place) 16. Charging interface: Type-CUSB-C 5V1A 17. Compatible devices: Android, IOS system cell phones and PAD, active speakers, amplifiers and Bluetooth speakers or headphones supporting A2DPprotocol connected to use 18. Packing list: adapter x1, remote control (including a button battery) x1, FM radio antenna x1, 3.5mm audio cable x1, RCA lotus cable x1, charging cable x1, manual x1 19. Size: about 9.8 x 6.7 x 2.35cm 20. Weight: about 143g Features: 1. Using Bluetooth 5.1 chip design, more compatibility and stability 2. Bluetooth receive (RX), Bluetooth transmit (TX) two in one 3. Equipped with high-definition LED digital display screen, working status and Bluetooth mode clearly visible 4. Built-in DSP decoding chip, heavy bass effect, the device supports treble bass button adjustment 5. With NFC function, cell phone induction a touch that is connected 6. Controllable indicator light, soft and non-blinding, the light brightness follows the volume of the corresponding brightening darkening 7. Support U disk TF card playback and launch, support MP3 WMA SBC WAV DTS A52 FLAC AAC AIF AMR APE format 8. Built-in FM radio, one key to automatically search and store the station, the frequency can be adjusted from 87.5 ~ 108 9