Feature:1. The 3.5mm AUX interface is widely compatible with plug and play, and can be used on audio devices with AUX input interfaces.2. Bluetooth version 5.2, higher transmission efficiency, secure navigation without delay.3. 3.5mm wireless adapter supports both Bluetooth transmitting and receiving, namely TX and RX Mode. 4. Ultra compact design of this Bluetooth transmitter and receiver would save your space. You can easily carry this Aux Bluetooth adapter around and everywhere easily without any hassle as its portable size and lightweight design.5. The build in microphone can be used to answer hands free calls.6. Support connecting two devices at the same time. Computer/Mobile phone/Tablet connect at will, swtich at will.If you like this item, I hope you can take some time to give us a five-star review, and I will be grateful.If you have any questions, please feel free to contact me and we will solve the problem for you. Before you leave a negative review or apply for a return, I believe we can communicate and solve the problem.