Large Color Screen: The Bluetooth FM transmitter has a larger color screen, and the color notes on the screen can beat with the music being played, bringing you dynamic music enjoyment. In addition, a larger color screen can provide more information for your driving, such as battery voltage, volume, incoming phone number, FM channels, track name and song duration, etc. Stronger Microphone for Hands-Free Calls: A microphone is added to this Bluetooth transmitter, which greatly improves the ability Bluetooth transmitter to receive external sounds. When making a hands-free call, it can pick up your voice well and transmit it clearly to the other side of the call, giving you a pleasant calling experience. Treble and Bass Music Streaming: With the two buttons of Bass and TRF, you can freely switch between treble and bass modes. And the Bluetooth transmitter supports four music playback methods, including Bluetooth / MicroSD card / USB flash drive / AUX. Smart QC3.0: It comes with a QC3.0 charging port to provide high-speed charging, and the charging speed is up to 4 times faster than standard chargers. And another USB charging port works as a charging port or U disk port for listening to music.