Purchased in 2020, but I barely used it. TaoTronics Bluetooth Transmitter Receiver aptX-LL Low Latency Bluetooth 5.0 Receiver Transmitter, 15-hour playback, simultaneous connection of 2 devices, can be used while charging, two-in-one, small TT-BA09 Instruction manual has a tear, please check the image. Stored at home, for those who understand.