【Latest Bluetooth 5.0 & 3 Music Playback Modes】This car charger adopts the latest Bluetooth 5.0, which expands the transfer speed by 2.5 times compared to conventional Bluetooth, achieving overwhelming high-quality sound. ・【3 USB Ports & PD 20W Fast Charging】 This FM transmitter is equipped with USB ports and can charge external USB devices. It has three charging ports, making it convenient to charge three devices at once. The PD fast charging port has a maximum output of 20W, allowing for fast charging of smartphones while suppressing heat generation. ・【Easy to Use】 1. Adjust the car's FM frequency to a blank channel (a channel without broadcasting) within the range of 87.5-108.0MHz. Match the FM transmitter's frequency to the same channel. Bluetooth connection - Turn on the Bluetooth of your device and search for [T832] to connect, or you can play music directly from a USB memory stick. ・【3-Way Music Playback & Hands-Free Calling】 You can choose music playback from three modes: Bluetooth mode, U-disk, and TF card mode. Once paired with a music player or smartphone via Bluetooth, you can easily connect and automatically play music in conjunction with the engine's on/off switch.