1. The advanced CSR 5.0 chipset combined with A2DP provides stable connection and excellent signal stability. The uninterrupted and clear HiFi music stream offers a pleasant listening experience. 3.5 mm AUX or RCA audio connectors are ideal for wired headphones/speakers, home audio systems, car stereos, and portable non-Bluetooth devices. 2. The transmitter function converts a 3.5 mm audio output device into a Bluetooth device that can send Bluetooth audio. The receiver allows a non-Bluetooth device, such as a car or home stereo, to receive high-quality audio. Switch between transmitter and receiver modes with a single button press. Simple connection with advanced Bluetooth technology and 3.5 mm audio cable (included). 3. In receiver mode, you have full control over music, including play/pause, track selection, and volume control via buttons on the adapter control. Adapters can be connected to traditional devices like wired headsets or speakers to receive Bluetooth audio directly from phones and tablets. 4. Simply slide the switcher to ON/OFF and connect the 3.5 mm audio connector on this wireless music adapter to the 3.5 mm / 2.5 mm 2RCA port for use in car/home audio systems, non-Bluetooth home speakers and headsets, paired with Bluetooth-enabled devices to enjoy music and automatically repair for simple enjoyment. 5. With the included 3.5 mm cable and 3.5 mm to 2RCA cable, this transmitter/receiver adapter is widely used for your computer, laptop, home audio system, headphones, smartphone, MP3 player, CD player, etc.