A Bluetooth receiver is a device that allows audio signals to be transmitted wirelessly from a Bluetooth-enabled source, like a smartphone or tablet, to a non-Bluetooth audio system, such as speakers or headphones. This technology enables users to enjoy music or calls without the hassle of wires, making it convenient for various settings, including home audio systems and car stereos. Typically, a Bluetooth receiver connects to the audio system via an auxiliary or RCA cable. Once paired with a Bluetooth device, it can receive audio signals, allowing users to stream music or take calls seamlessly. These receivers are compact and portable, making them easy to use in different environments.