A Bluetooth audio receiver is an electronic device or module that enables wireless audio streaming from Bluetooth-enabled devices, such as smartphones or computers, to speakers, headphones, or audio systems that lack built-in Bluetooth functionality. The receiver pairs with the transmitting device using Bluetooth technology, receives the audio signal, and outputs it through a physical audio connection, such as a 3.5mm jack, RCA, or optical port. This allows users to upgrade older audio equipment for wireless playback without replacing the entire system. In cybersecurity, Bluetooth audio receivers can pose risks if not properly secured, as unauthorized users may attempt to connect or intercept audio data.