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 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 speaker, and wireless listening to music is more free. When TV connects to the headset, the game is more enjoyable 5. Driver‑free, plug‑and‑play, fast matching connection, more convenient to use. Free connection of mobile phone audio, convenient and fast How to Use: Specification: Item Type: USB Adapter Material: Plastic Input Voltage: DC/5V Transmission Distance: Approx. 8meter / 26.2ft Bluetooth Version: 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: (1). First plug the product into the USB port and power on (2). When the power is turned on, the default mode of this machine is the transmitter mode. 2. Pairing and Usage Method: (1) How to Use the Receiving Mode: The blue LED light flashes to indicate that it has switched to the receiving mode. The USB of this product is used for power supply and can be plugged into any USB interface with 5V output. For example,