Bluetooth V5.0 and HD + LL Adopt the latest CSR8675 chipset and Bluetooth V5.0, double the transfer rate. 2 in 1 Bluetooth transmitter (TX) / receiver (RX) can support HD (High Definition) and LL (Low latency). With HD, you can enjoy HD stereo sound; With LL, you can watch video while listening to audio wirelessly synchronously and without audio delay.Multiple Applications: Digital Optical + 3.5mm AUX + RCA Equipped with digital and optical AUX interface. Comes with TOSLINK SPDIF cable, 3.5mm AUX and RCA audio cable, it can satisfy all your connection needs and match with various audio devices with bluetooth and non-bluetooth function.Dual Pairing + Auto Connection TX and RX modes both support pairing with 2 Bluetooth devices simultaneously. Share the fun with your friends. The Bluetooth adapter will automatically connect to your devices after the first connection.24H playing time + 20M distance Adopting the long-lasting 600mA lithium-ion battery, it can play continuously for more than 24 hours while fully charged in about 3 hours. Support using while charging. Free use of the cable, the maximum wireless distance is more than 20 meters (without obstacle).LED indicator and button control 11 LED indicator to indicate the status used by bluetooth: you can adjust the volume, change songs, play or pause this device.