QC3. 0 charger+type-c pd 18w quick charge:the fm transmitter support charging two devices simultaneously, quick charge 3. 0 port and type-c pd 18w ports compatible with: qc2. 0, hua wei fcp, afc, type-c and samsung, and type-c pd full charge compatible device up to 4x faster, and another usb port supports reading u disk up to 32G. under the maximum output, the charger efficiency is more than 80 percent, so that your device can be fully charged i short time. better-charging perf.Answer calls hands-free : high-performance microphone with noise suppression cvc technology, grants you crystal clear call. answering/redialing/dismissing or ending the call just simply click a button. seamlessly switches between incoming calls and music; drive more safely. moreover, the transmitter supports voice navigation of your phone. meanwhile, power off or power on, just slightly rotate the phone button.Immerse in hi-fi super bass sound music: insert a usb flash driver which contains mp3 files into the right usb port and enjoy it. if thats not enough, it calso support your playlist with no distortions of the original signal from your mp3, iphone, android smartphones and more enabled devices. moreover, with the help of music sound effect, dance music, dj, rap, and light music can be enhanced via the music sound effect buttonb.Multi-safety protection : comes with built-in over-current protection, over-voltage protection, intelnt temperature control, short circuit protection. the fm transmitter effectively prevents multiple unsafe problems. low noise and low ripple output, which can effectively reduce the loss of electronic devices within the charging device. better protect your car and smart devices.Wide compatibility : car fm transmitter can be paired as a hands-free kit with all enabled devices, such as iphone, ipad, ipod, tablet, samsung, htc, sony and other android smartphones; stream music and calls directly from your mobile devices.