Grwibeou AptX HD LL Low Latency Bluetooth 5.0 Audio Transmitter Receiver Wirele Adapter RCA SPDIF 3.5mm Aux Jack for TV PC Car Model No: B20 Bluetooth 5.0 Receiver and TransmitterBluetooth version Bluetooth V5.0Support protocol RX: A2DP AVRCP TX: A2DPWorking frequency 2.402GHz -2.480GHzPower level Power level 2 (Cla II)Sensitivity (-80dBm<0.1%BER)S/N ratio 75dBDistortion 0.1%Support Dual stream Support Dual stream (TX mode) Support (a transmitter is connected to two Bluetooth speakers or headphones at the same time to use a CODEC)Support Multipoint (RX mode) Support (connect two mobile phones)Codec TX: apt-X HD, apt-X LL, apt-X, SBC;RX: apt-X HD, apt-X LL, apt-X, SBC, AAC;Note for use of APTX: Priority support for apt-X HD CODEC in single connection (the connected device must also support apt-X HD)Working current The appearance of the product is exquisite. Adopt high-end chip design. CSR's latest ANC noise reduction and echo cancellation technology Support TX dual stream, RX multi-point connection. SPDIF, I2S audio input/output interface, can be switched freely Built-in rechargeable battery, long battery life Support SBC, MP3, AAC, apt-X HD, apt-X LL, apt-X audio formats 16Mb built-in eFlash and up to 64Mb external serial flash memory, digital-to-analog conversion signal-to-noise ratio up to 75dB Support TWS (left and right channel separation) The product connection is simple, without any cumbersome driving and downloading APP;