1. Seamless Connectivity: The FM transmitter offers wireless operations such as answering, hanging up, rejecting calls, and redialing, enhancing your driving experience with hands-free convenience. Its support for wireless stereo music play allows you to enjoy your favorite tunes in audio during your journey. 2. Digital LED Display & Car Battery Monitoring: Equipped with a digital LED display, this wireless handsfree car kit not only shows the FM frequency but also supports car battery voltage detection, ensuring your vehicle's battery is in good condition, providing extra peace of mind. 3. Versatile Music Playback: The audio MP3 player function supports USB flash drive playback and is compatible with MP3/WMA music formats, offering you a wide range of audio options. Enjoy your personal playlist without limitations, making every drive a musical journey. 4. Quick Charging Feature: With the fast charger capability, this fast USB FM modulator ensures your devices are charged quickly and efficiently while on the move. No more worrying about your phone or music player running out of power during long trips. 5. Broad FM Frequency Range: Offering a full FM broadcasting function with a frequency range of 87.5-108.0MHZ, this FM transmitter allows you to find the perfect frequency without interference, ensuring crystal clear audio. Additionally, the auto power-off memory function ensures you won't have to search for your preferred settings every time you start your vehicle. Bluetooth-Compatible version: 5.3 Output protection: overcurrent protection, overload protection, overheating protection, overvoltage protection, short circuit protection Input voltage: DC12-24V PD port output voltage: 5V/9V/3A 12V/2.5A PPS 3.3-5.9V/3A 3.3-11V/2.75A independent PD fast charge USB-A port (U disk): 5V/2.4A (12W), supports maximum current output at normal speed Rated output power: 42W PD30W +USB-A12W Playing music current: 70mA FM frequency: 87.5-108.0MHz Support music formats: MP3, WMA, APE