Car charger with FM Bluetooth transmitter. Allows you to listen to the music stored on your smartphone via radio, as well as charge up to two mobile devices at the same time. Dual USB port allows you to charge up to two portable devices at the same time. Wireless music playback - the accessory plays audio files from the attached flash drive, allowing you to enjoy your favorite music while driving. Voice Booster uses car speakers, making all navigation commands perfectly audible. Built-in microphone allows you to talk without having to reach for the phone. The multifunctional button is used to answer and reject calls and redial a number. Cigarette lighter socket allows you to connect e.g. another charger. Digital display informs about current voltage and transmission frequency. Blue LED backlight makes it easy to locate the charger at night. Specification: PC Input: DC 12V-24 Output: Dual USB 3.4A Bluetooth version: 4.2 Bluetooth name: S-06 Transmission frequency: 87.5-108.0 MHz