Item Type: Bluetooth Adapter Material: ABS Color: Black Main Chip: CSR8675 Bluetooth Version: Bluetooth 5.0, EDR,  Class 1 Frequency Range: 2.402-2.480GHz Bluetooth Distance: Approx. 70m/229ft Bluetooth Protocol: A2DP, AVRCP Music Format Format Codec: Aptx-HD, Aptx-LL Aptx, SBC.bu Input/output Connection: SPDIF, 3.5mm/0.13in Stereo Audio Interface Mode: TX Mode, RX Mode, Bypass Mode 1、Using the highest version of bluetooth V0 and high end CSR8675 chip, providing the best transmission efficiency, stability and ultra low power consumption, Aptx low latency technology eliminates bluetooth audio delay, provides a perfect sound experience, allowing you to enjoy high definition sound and Watch perfectly synchronized TV movies and videos.  2、TX mode: Connect the bluetooth transmitter to an audio output device, such as a TV or PC, and you can enjoy ultra fast and high fidelity audio from bluetooth headphones, earphones or speakers, RX mode: Enable and restore the old home stereo system.  3、The barrier free signal transmission distance can reach 70m/229ft, the antenna design, the transmission range is wide and stable, suitable for mobile phones, TV boxes, MP3, MP4, speakers, wired headsets, bluetooth headsets, laptops, power amplifiers, car speakers.  4、BYPASS (wired) mode: Wired connection between TV and sound bar or speaker amplifier (without bluetooth), no need to plug and unplug any cables, easily switch to the other two modes, support 5mm AUX and RCA digital audio connection or optical audio input and output.  5、The LED indicator is used to identify the working mode, different codecs (aptx low latency, aptX, SBC), 5mm/0.13in audio optical fiber connection, to identify whether the pairing is successful and easy to configure, bluetooth speakers or headsets based on bluetooth A2DP profile, which can achieve smooth operation.