Feature: 1. This portable, lightweight wireless audio transmitter and receiver is an ideal wireless audio solution for various situations and uses 2. Transmitter mode wirelessly transmits audio from non-Bluetooth TV, home stereo system or CD player to Bluetooth headset or speaker 3. Receiver mode wirelessly transmits audio from Bluetooth-enabled mobile phones, tablets or computers to wired stereo, speakers or headphones 4. When computer connects to the Bluetooth speaker, and wireless listening to music is more free. When TV connects to the Bluetooth headset, the game is more enjoyable 5. Driver‑free, plug‑and‑play, Bluetooth fast matching connection, more convenient to use. Free connection of mobile phone audio, convenient and fast Specification: Item Type: USB Bluetooth Adapter Material: Plastic Transmission Distance: Approx. 8meter / 26.2ft Bluetooth Version: Bluetooth 5.0 Input Interface When Transmitting: 3.4MM+USB Output Interface When Receiving: 3.5MM Operating Range: Up to approx. 10meter / 32.8ft (no obstructing objects) Pairing Name (receiving method): M188 Transmitter Mode: Red LED light is on Receiver Mode: Blue LED light is on Adapter Size(LxW): Approx. 4.3 x 2.5cm / 1.7 x 1in Cable Length: Approx. 22cm / 8.7in 1. Mode Switching: (2). When the power is turned on, the default mode of this machine is the transmitter mode. 2. Pairing and Usage Method: (2) How to Use the Transmitter Mode: The red LED light flashes to indicate that it has switched to the transmitter mode. The USB of this product is used for power supply and can be plugged into any USB interface with 5V output. In the transmit mode, the product will automatically search for other devices that have been turned on (such as earphones, speakers, receivers, etc.), and the red light will be on when the pairing is successful. Use 3.5 headphone cable to connect the product to TV, computer and other devices with sound output. At this time, the sound played by the TV is wirelessly transmitted to the speakers, earphones and other devices through this product. (3) This machine is small and exquisite, but has powerful transmitting and receiving functions, which is convenient to carry. (4) Extensive compatibility. This product is widely used in your computer/pen-computer/home stereo system/headphone/smart phone/MP3 player/CD player, etc. (5) How to Use the Microphone Call: The product and the mobile phone can be successfully paired with the microphone call mode. (6) RECEIVE/RX on the machine is the audio output port in receiving mode. (7) RANSMIT/TX on the machine is the audio input port in transmit mode.. Package List: 1 x USB Bluetooth Adapter1 x Cable1 x User Manual