30W PD Fast Charging The bluetooth car adapter has a PD 30W fast charging port. Provides faster charging for your devices than traditional car Bluetooth transmitters. Integrated over-current, over-voltage, over-charging, overload, overheating and short-circuit multiple protection functions, safer and more reliable use Clear Stereo Sound Our bluetooth transmitters are equipped with CVC noise cancellation and anti-interference, allowing you to enjoy impressive sound quality. Through reduce background noise to improve voice quality dramatically, ensuring your voice is transmitted clearly so you can experience unrivalled call clarity Bluetooth Hands-free System Bluetooth 5.3 makes the connection more stable and transmission faster. You can easily answer/end/reject the incoming call/set the last dialled number by just pressing a button. Provides both Bluetooth and USB stick connection. Bring you more comfortable using experience Ambient Light Switch Design Experience the joy of driving with our stylish rainbow light feature. When not in use, press and hold the b switch to easily turn off the lights, and press it briefly to enjoy the colour change of the lights Wide Compatibility This car bluetooth transmitter is suitable for most bluetooth devices, such as Apple 8-14 full series, iPad Pro series, AirPods, AppleWatch series, Huawei, Honor, Xiaomi and OPPO brand devices. Suitable for 12V-24V cars and trucks