Bluetooth Audio & Data Roles: RX, TX, and Bidirectional Understanding the distinction between Bluetooth Receivers , Transmitters , and Bidirectional (Transceiver) devices is essential for hardware configuration, audio routing, and peripheral integration. Core Comparison Mode Direction of Data Flow Primary Function Typical Use Case Receiver (RX) Wireless → Wired Receives a Bluetooth signal from a source device and outputs it via a physical port. Playing music from a smartphone through an older, non-Bluetooth home stereo or car AUX port. Transmitter (TX) Wired → Wireless Captures an audio/data signal from a wired source and broadcasts it via Bluetooth. Connecting a non-Bluetooth TV or airplane entertainment system to wireless headphones. ...