【Transmitter/Receiver 2 IN 1】 - The portable adapter that can be used either as a transmitter or receiver. In transmitter mode, the adapter connects to your Bluetooth-enabled receivers such as headphones or speakers and transmits the audio signals to these devices. In receiver mode, the adapter connects to a Bluetooth-enabled mobile phone and receives audio signals from it to pass you on. Works with a device with 3.5mm interface. | 【Bluetooth 5.0/EDR】 - With updated V5.0/EDRtechnology, our wireless audio adapter enables a more stable connection to devices. Our Bluetooth receiver transmits music from your Bluetooth enabled smartphone up to 15m (without obstacles). Ideal for home or vehicle audio systems. | 【Wide compatibility】 - It automatically adapts with Bluetooth headphones, headphones, speakers and other Bluetooth enabled audio system.With the included 3.5mm cable, this USB Stick Adapter can be used on your computer, laptop, home stereo system, headphones, smartphone, MP3 player, CD player, etc. use. | 【Plug.Play】 - The Bluetooth transmitter and receiver does not require installation of an external driver. The red light is the transmitter mode and the blue light is the receiver mode. You can unplug the Bluetooth adapter from the USB port and re-insert it to switch between the two modes. Easy to carry and space saving. As long as the indicator light is on, it can be used normally, you can ignore the "USB is not recognized" prompt.