B11 Bluetooth 5.0 Receiver AUX NFC to 2 x RCA Audio Adapter 1. Support NFC: built-in chip, you can connect with the NFC mobile phone or other support NFC Bluetooth device directly by touching this receiver 2. Playing music on 2 speakers simultaneously: With both 3.5mm and 2xRCA 2 kinds of connection options, you can enjoy music on 2 speakers simultaneously. 3. Support dual audio ports to connect: come with both 3.5mm and 2xRCA audio port, suitable for more devices (3.5mm cable and 2RCA cable included). 4. Long-range wireless connection: The effective distance up to 10 meters33 feet, controlling the music playing in a long distance. 5. Support auto TURN ONOFF: Using the charger cable connect to your car or other power, when start the car or it have power, it will auto turn on, and automatically connect to the device which you last connected. When the car turned off, it will auto turn off. 6. Bluetooth 5.0 version: Compliant to Bluetooth version 5.0, backwards compatible to Bluetooth 4.24.14.03.02.01.0. 7. Material: ABS 8. Working power supply: DC 5V 9. Transmission distance: about 10m 10. Transmission rate: 100 Mbps 11. Audio interface: 3.5mm + 2xRCA 12. Size: 6x6x2cm 13. AV cable length: 95cm 14. Power cable length: 95cm 15. Audio cable length: 95cm