LOKUKA USB to 3.5mm Female port Bluetooth car audio adapter is a great choice to add Bluetooth to your old aux devices. Simply connect it to an aux cord of your amplifier, car stereo, speaker, headphone, or any other audio device, connect the USB port to power the Bluetooth, and it's ready to use. The green light flashes quickly when it's USB-powered and turns into a slow flash when the Bluetooth "YP04" connects successfully. It supports Bluetooth music, hands-free calls, voice navigation, etc. | 【Bluetooth 5.1, Stable Connection】This aux Bluetooth adapter for car uses Bluetooth 5.1 technology, which offers a stable connection and no latency or lag. You can enjoy uninterrupted music streaming without any stuttering or buffering. The built-in antenna design can realize 0-10 miles of long-distance transmissions. | 【Durable Design】With a 3.5mm audio output and high-fidelity transmission via enameled copper wire cores, this Bluetooth aux adapter delivers high-quality sound with no noise or current sound, ensuring that you enjoy a crystal-clear audio experience. Also support mobile phone music and call functions, with car echo cancellation. Its compact and portable design makes it perfect for travel, and the zinc alloy casing ensures that it's durable and long-lasting. | 【1-to-2 Dual Connection】This car Bluetooth adapter has a 1-to-2 feature that allows you to connect two phones simultaneously, making it easier to share music and switch between two devices. It also has an automatic reconnection feature, ensuring that it automatically connects to your phone when you return to your car. | 【❤️Reliable Customer Support❤️】24-hour free online Q&A, 30-Day unconditional refund or replacement, 12-Month unconditional warranty, you can also extend it to 18 months for free via support(at)lokuka.com, and lifetime technical support will solve any issues for you. Buy with confidence and contact us freely!