Bluetooth 5.3Car Bluetooth Transmitter adopts Bluetooth 5.3 technology. Optimizes the transmission delay and interference sensitivity of Bluetooth 5.1. Provides a faster and more stable connection. It allows you to enjoy smoother and better quality music and calls. PD 30W & QC 3.0Dual USB ports and one Type-C port allow you to quickly charge up to three devices at once and provide better charging performance. The car bluetooth fm transmitter has intelligent temperature control and short circuit protection to ensure safe charging Easy to UsePlug the car bluetooth transmitter into your car cigarette lighter, connect the adapter to your Bluetooth mobile phone, then tune the car stereo and the adapter to the same FM frequency (blank frequency). You can enjoy music and voice control Dual MicrophoneOur bluetooth cigarette lighters feature high-performance noise-canceling microphones for clearer hands-free calls. Voice capture is also more accurate when using your cell phone's voice control for commands such as making a call, sending a message, or getting directions