B2 Bluetooth Audio Transmitter Adapter 1. Plug and play, no need to install software drivers 2. Support dual stream (TX mode): support one transmitter to connect two bluetooth speakers or headphones at the same time and use one CODEC at the same time, also support APTX LL 3. Support multi-point connection (RX mode): support to connect two mobile phones 4. Adopt CSR high-end chip design 5. One-key switch between RX and TX modes 6. There will be a low battery reminder when the power is lower than 20%. The product will automatically enter the sleep power saving mode after 6 minutes in the RX and TX mode without connection. It has its own battery protection IC, which is safe and reliable while charging. 7. RCA, I2S audio inputoutput interface, can be switched freely 8. Two antennas, the Bluetooth distance is more than 80 meters, and the stability is strong 9. High-fidelity lossless sound quality, ultra-low latency sound output; support apt-X LL, apt-X, SBC, AAC, FS 10. Automatic reconnection can be realized in both receiving mode and transmitting mode, and has a memory function for connected products 11. Frequency: 2.402GGHz-2.480GHz 12. Inputoutput connection method: RCA interface, I2S AUX interface, support RCA, AUX dual output at the same time 13. Battery capacity: 500mAh 14. Transmission rate: 2.4Mbps 15. Working frequency band: 2.402GHz -2.480GHz 16. Battery life: RX about 10 hours, TX about 8 hours on average 17. Charging time: about 2.5 hours 18. Supported protocols: RX: A2DPAVRCP, TX: A2DP 19. Bluetooth version: V5.0CSR8675 20. Charging method: Micro USB 5V0.5A 21. Charging power: 2.5w 22. Dimensions: 11 x 9 x 2.5cm 23. Net weight: 70g Product acessories: - USB charging cable x 1 - 3.5MM audio cable x 1 - RCA audio cable x 1 - Manual x 1