[Upgraded Version of Classic KM18]: New KM18 upgraded with 1.8-inch TFT color display screen, offers a wider visual interface for more information, such as incoming phone number, track name, FM frequency, battery voltage, Bluetooth connected device and more. [QC3.0 & 5V/2.4A Dual USB Charging]: The Bluetooth car adapter comes with a 5V/2.4A and a QC3.0 charging port to deliver simultaneous high-speed charging to driver and passenger. Charging time is up to 4 times faster than conventional charging. [Crystal Clear Hands-free Calls]: Provides a stable connection and echo cancellation to reduce background noise for clearer hands-free calling. [Music Streaming]: Play favorite songs on car stereo through Bluetooth, microSD card, or Aux input. Customize music playback with 5 EQ styles (Normal, Classic, Pop, Rock, Jazz) and 4 playback modes (Repeat All, Repeat One, Random, Folder) via microSD card. [Safety Feature]: Safety first. KM18 Color includes a voltmeter to monitor your car battery condition. Voltage should read between 13.2V to 14.7V when engine is running, and 12.2V to 12.8V when parked and ignition is off.