D9 2-in-1 Old-fashioned Audio Car Bluetooth Receiver Transmitter NFC Music Bluetooth Adapter Features: 1. Receivetransmit two-in-one, one-button switching is more convenient 2. Bluetooth 5.1 high-performance chip, stable transmission, low latency 3. Large-capacity battery, long battery life 4. Rich interfaces, strong compatibility, support various audio interfaces 5. Support TXRX dual mode 6. Support NFC mobile device touch connection, convenient and fast, no manual operation 7. With infrared remote control, 5-8 meters infrared remote control, the operation is more convenient 8. 30m range connection, long-distance barrier-free transmission 9. U diskTF card playback, plug and play, lossless decoding Product parameters: 1. Material: ABS 2. Bluetooth version: 5.1 3. Audio decoding: SBC 4. Bluetooth protocol support: A2DPAVRCP 5. File format: MP3WAVWMAFLACAPE 6. Frequency range: 2400MHz-2483.5MHz 7. Frequency response: 20Hz-20KHz 8. Output load: 16-320 ohms adaptive 9. Transmission distance: 0-30m (open place) 10. Audio input: Bluetooth audio U disk AUX RCA 11. Output: AUX RCA 12. Charging interface: Type-CUSB-C 13. Battery capacity: 500mAh lithium battery 14. Compatibility: Android and IOS mobile phones, tablets, TVs, game consoles and other Bluetooth devices, and audio equipment with audio input interface 15. Product size: about 90 x 58 x 22mm Packing list: -Host x 1 -Audio cable x 1 -RCA cable x 1 -Power cable x 1 -English manual x 1 -Infrared remote control x 1