36W QC 3.0 + PD 3.0 Fast Charger: get 4 times faster, efficient charging on the go, the PD port offers fast charging for iPhone 8 or later, while the QC 3.0 port works with older phones that are incompatible with PD protocol.ILOKEY Bluetooth 5.3 FM Transmitter: a wireless workaround for playing portable audio (cell phone, MP3 player) on car radios that dont have Bluetooth connectivity, personalize your own radio program on the way to work or travel.Enjoy Hi-Fi Stereo Audio: allows portable audio devices to make use of the louder and better sound quality of car stereo without requiring a wired connection.Hands-free Phone Call & Siri Voice Assistant: press the call button for 3 seconds to activate Siri, improve your driving safety with hands-free phone control.Easy to Use: plug in car cigarette socket, tune your car radio and the fm transmitter to same frequency (87.5 -108.0 ), then pair your phone with Bluetooth name BC95