QC3.0 & DUAL USB CONNECTIONMaximum charging power Support charging two devices simultaneously, one port is Quick Charge 3.0 port. 4x faster than standard charging efficiency, another USB port with music icons can be used as a charger and flash drive that can support up to 64g. FREE SPEECHPowerful microphone with suppression echo reduction and CVC (noise cancellation) technology for clear calls. Seamless switching between incoming calls and music enhances security. WIDE COMPATIBILITYBluetooth car fm transmitter can be paired with all Bluetooth-enabled devices in hands-free mode, such as iPhones ,ipad,ipod,tablet,samsung,htc,sony and other andriod smartphones. BLUETOOTH 4.2 LOSSLESS TRANSMISSIONNewly updated Bluetooth 4.2 fm transmitter technology provides FM signal more stable, better anti-interference performance, so you can enjoy your lossless transmission with enhanced stereo music. COMPACT DESIGN AND ROLLING STYLISH METALOxidized apple ash sandblasted in surface and sleek metal knurling, eco-friendly ABS housing with matte finish, the FM transmitter adapts perfectly to your interior. Thanks to the LED display, you can easily find it in the dark.