2 USB Ports & Safe Charging: Supports charging 2 devices simultaneously with overcharge protection. One USB port (5V/1A) with a music icon can read USB drives, while the other USB charging port (5V/2.4A) efficiently recharges your smart device. Enjoy stereo streaming in the car and charge your smartphones at the same time. 3 Music Playback Modes: This Bluetooth car adapter can freely stream clear stereo music in 3 ways: A. Bluetooth connection; B. USB flash drive (≤32GB); C. TF card (≤32GB), supporting MP3/WMA/FLAC/WAV/APE formats. Hands-Free Calling: With a built-in microphone featuring echo cancellation and noise reduction (CVC) technology, this Bluetooth car transmitter offers an amazing hands-free function; answer/reject/hang up/redial calls all with a single multifunction button; Automatically switches to hands-free mode from music playback when incoming calls occur. Blue Ambient Light: When powered on, the ambient light ring illuminates in blue, making it convenient to use in