FM Transmitter & Aux Mode: This Bluetooth car adapter with FM transmitter streams music from Bluetooth devices to your car stereo via FM signal. It also supports Aux audio input, connecting MP3/MP4 players without Bluetooth to your car stereo using a 3.5mm cable. Enjoy Hands-Free Calling: Our Bluetooth car transmitter features a high-performance microphone for crystal-clear call quality. Easily answer, hang up, reject calls, or redial the last number with a single button click. It also supports voice navigation from your phone. Use the multifunction buttons to control calls and music, seamlessly switching between them for safer driving. Experience advanced technology with the Bluetooth 5.1 Chip and Battery Voltage Detection: Benefit from faster pairing speeds and a more stable connection, optimizing transmission delays and connection issues found in older Bluetooth versions. Our car charger also features battery voltage detection for safe charging. Charge two devices at once with Dual-Port Fast Charging: The car charger has dual USB and USB C charging ports, delivering superior charging performance. With PD 30W and 5V 2.4A dual charging ports, it's 3X faster than standard chargers. Compatible with both Android and iPhone 8-14, tablets charge at full speed. Enjoy Wireless Lossless Audio Music Player: Use our Bluetooth radio music player adapter for lossless Hi-Res stereo sound playback with impressive audio quality. It supports Mp3/Flac/Ape and other lossless music formats, playing in multiple audio formats. Adjust the music volume directly using the scroll wheel.