Revolutionize your driving experience with our 4-in-1 Bluetooth Car Transmitter - seamlessly stream music, take hands-free calls, charge multiple devices at lightning speed, and protect your car's battery all in one sleek device Never miss a beat with crystal-clear audio transmission from your phone to your car's FM radio. This adapter transforms even the oldest vehicles into modern entertainment powerhouses for the ultimate road trip experience Stay connected and powered up with our unrivaled 54W charging capacity. Two QC3.0 USB-A ports and two 36W USB-C ports with PD and PPS fast charging ensure all your devices are ready for action, no matter how long the journey Safety first! Our smart undervoltage detection safeguards your car's battery, while the hands-free calling feature with built-in microphone keeps your focus on the road. It's the perfect companion for every responsible driver and tech enthusiast Upgrade your in-car entertainment system in seconds with our plug-and-play design. Compatible with iPhones, Android phones, and MP3 players, this versatile FM transmitter adapter is a must-have accessory for any vehicle, old or new