【Transmitter Receiver 2-In-1】 Universal Bluetooth audio adapter makes your TVs and other devices Bluetooth enabled to stream audio to your Bluetooth headphones, or makes your home stereo Bluetooth enabled to receive the wireless music streaming from your phone and tablet. Works with device which have USB port and 3.5mm port. | 【Bluetooth 5.0 + EDR】With upgraded V5.0+EDR technology, our wireless audio adapter enables more stable connection with devices and achieve a range of up to 50ft (15m) in open air and up to 33ft(10m) indoors. *Operating range can be affected by multiple factors. | 【Plug & Play】You can remove the Bluetooth aux adapter from USB port and insert it again to switch transmitter/receiver mode. Red light is transmitter mode, blue light is receiver mode. No driver required. Note: As long as the light is on, it can be used normally, and you can ignore the prompts such as 'USB cannot be recognized'. | 【USB Power Supply】Charge it on the USB port and connect it to your audio device via 3.5mm aux audio cable(included) while using, never worry it will run out of power while listening to music. | 【Note】Plug the transmitter into the PC, as long as the red light flashes, the transmitter can be used normally, and the PC will automatically pair the Bluetooth device. The PC system does not display the Bluetooth logo, and you cannot manually search for Bluetooth devices for pairing. *Feel free to contact us if you need technical support.