about this article QC3.0 Fast Charging & Type-C ChargingThe Bluetooth 5.0 FM transmitter has 3 USB ports: QC3.0 + Type-C + 5V/1A, which can charge three devices at the same time. With the latest QC3.0 technology, you can truly experience the ultimate charging of QC3.0-enabled devices. Type-C port (5V/3A) can effectively fully charge your IOS or Android devices. The 5 V/1 A USB port can read USB sticks up to 32 GB. Crystal Sound and EQ FunctionThe FM transmitter bluetooth adopts CVC noise reduction technology, the sound quality is extraordinary when playing music. It also supports equalizer adjustment function, just press the "EQ" button in music mode to track its on/off bass effect. Instantly improve the sound quality of your car. 3 Music Playing ModesYou can share the best quality music with your friends via Bluetooth/U disk (32GB)/TF card (32GB) on this car music player, long press the "Previous" button to switch Mode: Bluetooth USB TF. Music in MP3/WMA/FLAC/WAV format is supported. Hands-Free CallingWhen the Bluetooth FM transmitter is connected to your smartphone, it can provide you with smooth and clear calls with echo cancellation and CVC noise reduction technology. Just press the FM button to answer/end/reject/redial calls, seamlessly switch between incoming calls and music. Make driving easier and safer. Bluetooth V5.0 and Stable TransmissionUsing Bluetooth 5.0 technology, the connection is more stable and the transmission speed is faster when the FM transmitter is connected to the smartphone. Compared with Bluetooth 4.2, Bluetooth 5.0 has: 2 times the data transmission rate, 4 times the transmission interval, 8 times the transmission message capacity, and is compatible with V1, V2, V3, V4, V4.1, V4.2.