[Bluetooth Car Adapter]-This Bluetooth car kit is a great option for non-Bluetooth car stereo, it will help you use your car speakers for audio from smartphone for music, navigation and calls, which is a good choice for drivers who want hands-free calls and high quality music. | [Dual USB Car Charge]-Intelligently identifies your device for safe charging of Dual devices at full speed simultaneously (Output: 5V/2.4A/12watt).【Please note: this is a dual USB-A Port car charger, but not USB-C Lighter Charger 】 | [Noise Filter]-It comes with a ground loop isolator for clean and clear music. The noise filter can eliminate the buzzing noise caused by ground loop. It happens when the audio source and the speaker use the same power source in some car speakers or home stereo systems when using Bluetooth receiver. | [Auto-Connect]-This Bluetooth audio receiver will automatically connect to your phone when you start the car, no need to manually connect Bluetooth each time. Please NOTE: Make sure the Bluetooth of your phone is turned on before starting the car. | [Versatile Compatibility]-Compatible with most cars with a 3.5mm AUX input, the Bluetooth adapter integrates seamlessly into your vehicle for convenience. Moreover, the included dual-port USB car charger keeps your devices powered up at all times. | [What’s in the box]-Bluetooth aux adapter x1, Ground loop noise isolator x1, Dual USB cigarette lighter power adapter x1.