Humanized Rainbow Light SwitchIndulge in a delightful driving experience with our trendy rainbow light design of the FM transmitter car adapter. Immerse yourself in fun while having the convenience of easily turning off the light by long pressing the "b" button when unnecessary. Enjoy the captivating ambiance of the rainbow lights and have full control over your driving atmosphere. Upgraded Bluetooth 5.4 ChipThe latest Bluetooth 5.4 technology, optimizing the transmission delay and connection defect problems, Bluetooth 5.4 will bring you a faster, more stable and smarter connection with less sound quality loss, uninterrupted calls, and music experience. Effortless pairing in just one second, and automatic reconnection eliminates the need to re-pair each time. Efficient 42W Fast Charging & Dual PortsThe transmitter charging adapter features two USB Type-C ports delivering up to 42W, which can charge two devices simultaneously. Comprehensive safety measures including