FM Transmitter and Aux Mode: This FM transmitter Bluetooth Car adapter can stream music from Bluetooth devices to car stereo via FM signal. It also support aux audio input, which can connect MP3/MP4 without Bluetooth function to the car stereo through the FM transmitter via a 3.5mm cable Hands-free Calling: Our Bluetooth car transmitter is equipped with a high-performance microphone that provides clear call quality. Easily answer, hang up, reject an incoming call or redial the last number with just one click of a button. In addition, it supports mobile phone voice navigation. You can use the multifunctional buttons to control calls and music, switching seamlessly between calls and music for a safer driving Bluetooth 5.1 Chip and Battery Voltage Detection: With ours 5.1 Bluetooth chip, faster pairing speed and more stable connection, optimizing the transmission delay and connection defects of old Bluetooth version. Our car charger also has a battery voltage detection, it will effectively ensure safe charging Dual Fast Charging Port: The car charger have dual USB and USB C charging ports, which can charge 2 devices simultaneously and provide better charging performance. PD 30W and 5V 2.4A two charging ports, 3X faster than the standard charger. It can be used for Android as well as iPhone8-14, tablets charging at full speed Wireless Lossless Sound Music Player: Use our Bluetooth radio music player adapter, enjoy high resolution stereo sound lossless playback with more impressive sound quality, Support MP3/FLAC/APE and other lossless music, and play in multiple audio formats. You can adjust the music volume level directly through the scroll wheel setting