2-in-1 Transmitter Receiver: In TX mode, this Bluetooth transmitter can wirelessly stream audio from non-Bluetooth TVs, computers, and flight,gym devices to Bluetooth headphones or speakers. In RX mode, it can connect your smartphone to wired headphones/speakers/car stereo/home stereo via Bluetooth.Stable Bluetooth 5.0 technology: Built in Bluetooth5.0 chip, with dual output mode, better sound quality, no interference in and lower power consumption. Offering extensive compatibility and an exceptional audio experience.Ease of Use: USB bluetooth transmitter has the audio function, plug and play. (If the device such as phone does not have a USB port, insert a power bank and audio cable to connect the audio device for use.) Press the button to switch modes, with blue light for reception and red light for transmission mode