[Two in one Bluetooth transmitter and receiver:] 3.5mm TV Bluetooth transmitter supports Bluetooth transmission and reception, namely TX and RX modes. RX mode supports the simultaneous use of two devices, such as car stereo and home stereo, while TX mode supports the simultaneous operation of one device, such as a TV or PC. [Bluetooth 5.3- Farther and Faster: ]This wireless 5.3 USB Bluetooth adapter provides a stable connection of 10 meters , providing clear, practical, and enjoyable sound (Note: Phone calls are only supported in RX mode, not in TX mode). [Wide compatibility: ]This 3.5mm car Bluetooth USB adapter is compatible with devices with 3.5mm and USB A interfaces. The RX mode can be used for car stereo, home stereo, audio music streaming sound systems, amplifiers, speakers, headphones, while the TX mode can be used for , PCs, desktops, MP3, MP4, switches, and more. [Plug and play: ]A 2-in-1 Bluetooth USB adapter suitable for cars does not require the installation of drivers for any compatible devices. [Ultra Compact & Portable]With ultra-compact and small design, put it in your pocket or bag can easily carry this bluetooth audio adapter Colour:Black Material:plastic Package Contents: 2 x Bluetooth Transmitter Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.