Bluetooth 5.0 Transmitter and Receiver Bluetooth Transmitter: The Bluetooth transmitter function transmits audio wirelessly to Bluetooth headphones/speakers. Bluetooth Receiver: Turn the traditional car speaker or stereo into Bluetooth-enabled speakers. Works with device with 3.5 mm interface. (When used on PC, use USB charging data.) Latest Bluetooth Transmitter for PC When the USB charging data cable is plugged into the computer, it can be used as a transmitter to transmit audio, enabling the computer to have Bluetooth function. If the computer's USB interface is USB 3.0, after the computer is turned off, the computer's USB interface can still supply power to the transceiver and maintain the paired connection state. Always On Bluetooth 3-in-1 Adapter continuously streams even while charging. Built-in battery for up to 10 hours use - enjoy your favorite wireless content all the time. The red indicator light is always on when charging, and the indicator is off after charging is completed. Bluetooth Everywhere With the updated V5.0 EDR technology, our wireless audio adapter enables more stable connection with devices. Only 1 device can be paired at a time, the distance between the Bluetooth adapter and your Bluetooth devices should be within 50 feet. NoteWhen directly using the USB charging cable to transmit audio to the computer, you do not need to use a 3.5mm audio cable to connect to the computer, but a USB charging cable is required to support data transmission; directly using USB to transmit audio to the computer, the computer system volume cannot be adjusted, only the playback The volume of the software