Advanced Bluetooth 5.1 Technology: Experience superior sound quality with the Essager Bluetooth Audio Receiver and Transmitter, featuring the latest Bluetooth 5.1 for seamless connectivity. Versatile 3.5mm AUX Connection: Easily connect to a wide range of devices including TVs, PCs, car speakers, and more, thanks to the universal 3.5mm AUX input. Built-in Microphone: Enjoy hands-free calls and voice navigation in your car with the integrated microphone, enhancing your driving experience. Portable and Compact Design: Designed for on-the-go audio, this lightweight adapter is perfect for upgrading your listening experience wherever you are. Colour:Black Material:ABS+PC+TPU Package Contents: 1 x Bluetooth Adapter 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.