Compact 3-in-1 Bluetooth 5.0 audio adapter supporting transmitter, receiver, and bypass modes. It provides wireless audio transmission to up to two Bluetooth devices and can receive audio from two paired sources. The unit supports optical Toslink and 3.5 mm stereo connections, includes an LCD display, rotary encoder, navigation and level controls, and operates from a 5 V USB-C power source. Bluetooth range is up to 14 m in transmitter mode and 20–30 m in receiver mode.