luetooth 5.4 & Lower Latency: The Bluetooth transmitter receiver is equipped with the most advanced Bluetooth 5.4 smart chip, providing excellent audio decoding technology, guaranteeing up to 99% low latency, maximum restoration of the original sound.AptX Low Latency - Equipped with Enhanced microphones and upgraded CVC8.0 technology, the car bluetooth receiver aux effectively filters out road noise, resulting in clearer hands-free calls on both ends of the line.Compact Design for Easy Portability - The Bluetooth Car adapter takes up little space, so you can take it anywhere. Connect it to your vehicle, speakers, or any headphone jack, and the 3.5mm jack design gives you no tangled cords to untangle.Note:Before using the product,it must be fully charged.You can take this Bluetooth audio receiver whenever you go,Very good companion for drivers.If you encounter any problems during use, please feel free to let us know and we will help you at any time.Up to 10 Hours of Battery Life - The working time of this aux Bluetooth adapter is up to 10 hours when making calls or playing music. Use Type-C fast charging cable (included in the package) to fully charge in 2 hours.