Product DescriptionNOTE:- Please change another stable channel if it has a lot of static because of frequency conflict!- Please keep the frequency of FM transmitter and your car radio be the same!Features:[Crystal Clear Hands-free call] - Built-in Mic, CVC noise reduction technology, you can enjoy high fidelity Bluetooth hands-free effect[Dual USB Charging Ports + Type-C PD] - 2 USB Charge Ports: 1 Quick Charge 3.0 port and 1 standard USB port; Type-C PD port,you can charge devices more than 3 simultaneously. [QC3.0 + Type-C PD 18W Quick Charge  ] - PD 18W that up to 7X faster than a standard charger, QC 3.0 that up to 4X faster than standard charger![Upgraded Bluetooth 5.0 Version] -  More stable to connect, will not easily disconnectSpecifications:Bluetooth version: 5.0Frequency range: 88.1-107.9MHZFrequency stability: ±10ppmSocket Adaptor Input: 12-24VOutput Power: QC3.0+5V/1A,PDTransmitter distance: 5MPackage Included:1xFM Transmitter1xUser Guide