Description: 【2 in 1 Bluetooth Transmitter and Receiver】USB bluetooth 5.0 transmitter receiver has TX and RX Mode. Transmitter mode: Transmit audio through the USB port (wireless transmission). The audio is transmitted through the AUX port 3.5mm audio cable. Receiver mode: The audio is transmitted to the speaker through the AUX port 3.5mm audio cable. 【Stable Connection】USB Bluetooth 5.0 adapter, built with bluetooth 5.0 technology, offer a fast and stable transmission. 【Wide Compatibility】: This USB Bluetooth Adapter is compatible for computer, TV, projector (transmitting mode), speaker, earphone, car machine, call (receiving mode). 【Easy To Use】Simply press a button to quickly switch transmitter, receiver mode. 【Compact and Portable】: USB audio adapter, compact design, you can easily carry this Bluetooth adapter around and everywhere easily.   Specification: Material: ABS Size: 43mmx0.5mmx10.8mm/1.69inchx0.02inchx0.43inch Package Includes: 1Pcs USB Bluetooth 5.0 Transmitter Receiver 1Pcs 3.5mm Audio Cable Note: Please allow slightly errors due to manual measurement and different monitors.