Advanced Bluetooth 5.3 Technology: Experience a stable and efficient wireless connection with the latest Bluetooth 5.3, ensuring high-quality audio transmission without interference. Universal 3.5mm Jack: Compatible with a wide range of devices, this adapter easily connects to any speaker, headphone, or car audio system with a standard 3.5mm audio jack. Supports TF Card: Play your favorite tunes directly from a TF card, making it easy to enjoy music without using your smartphone or other devices. Handsfree Functionality: Built-in microphone allows for hands-free calls, providing convenience and safety especially while driving. Compact and Portable: Its small size and design easy to carry, ideal for travel, home, or office use. Color: black Material: plastic Package Contents: 1 x Audio Call Converter 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.