1.Adjustable Treble&Bass&Atmosphere Light: Easily balance the Treble and Bass to perfection with our Bluetooth car adapter's clearly marked adjustment knob, crafting your very own personalized music sanctuary. Long press the 'previous song button' to turn off the atmosphere light easily. 2.Upgrade Bluetooth 5.3 Technology: Experience seamless, high-quality music streaming with the Bluetooth transmitter's latest Bluetooth 5.3 technology, ensuring each play is a sonic delight. 3.Safety First: Our Bluetooth FM Transmitter enables hands- use and mounts at eye-level on the vent for easy, operation. Additionally, its unique lights provide illumination at night. 4.Dual Charging Ports: Our MP3 player Bluetooth transmitter features a dual-port design with QC 18W Type-A and PD 20W Type-C connections, meeting all your charging needs for a hassle- driving experience.