Latest 5.3 Bluetooth Chip: Equipped with the newest Bluetooth 5.3 chip, this Bluetooth aux adapter for car provides faster transmission, superior reliability and lower power usage. Experience clear calls, minimal static noise and CD-quality sound. | Optimized Hands-Free Calling: The aux Bluetooth adapter for car ensure safety and convenience with hands-free calling feature. Simply press the round button for calling and the built-in microphone will deliver crystal-clear voice quality. | Long-Lasting Battery: This Bluetooth aux adapter has a battery life of 6 hours for hands-free calls or music play. It takes only 2 hours to fully charge the device by using a Type-C charging cable (Included in the package). It also supports charging while using at the same time without any anxiety about travel range. | Universal Compatibility: Easily integrate this aux Bluetooth adapter with car audio systems, speakers, amplifiers. Just connect to the 3.5mm aux port to pair with mobile phones, tablets and more. | Simultaneous Dual Device Connection: This aux to Bluetooth supports connecting 2 devices simultaneously for seamless switching between calls and music. Ideal for multitasking while driving or for music-sharing at parties. | Note: This product is only an aux Bluetooth Receiver that cannot pair with Bluetooth headphones or BT speakers and is not designed for TV or airplane use.