Usage Tips:Dual Fast Charging PortsAs a car charger, it provides 18W USB-A QC3.0 and 30W USB-C PD fast charging options. You can charge your phone, smartwatch, or tablet simultaneously from 0% to 80% in just 30 minutes while stuck in traffic or running errands in town. Smart circuits protect devices from overcurrent, short circuit, overheating, and overcharging! Bluetooth 5.3 & HIFI MusicAdopting Bluetooth V5.3, it works great with higher stability, making pairing and transmission on various devices faster and easier without dropped calls and audio glitches. This FM transmitter allows you to stream lossless music from any Bluetooth-enabled device, allowing you to wirelessly access your favorite playlists on the road even in your 1994 Mazda Miata! Compact & Metal HousingThis Bluetooth car adapter features a small and stylish one-piece structure that fits snugly into the cigarette lighter, freeing up more space on the dashboard. It is made entirely of heavy-duty zinc alloy with a delicate texture to ensure long-term use, better heat dissipation, will not melt and catch fire, and is safer than plastic! Hands-free CallingThe highly sensitive built-in microphone can pick up your voice well, and with the help of CVC noise cancellation technology to eliminate background noise, phone calls are clear and can be easily heard by both the car and the caller. Since you can answer and reject calls with just the touch of a button, you will definitely enjoy a clear hands-free calling experience! Enhance Your Driving ExperienceIt helps monitor the car voltage, and there is a blue ring light around the housing to help find it quickly in the dark and provide some necessary brilliance to your car. This Bluetooth FM transmitter can transmit any audio from your phone to the car system, including navigation and voice assistant, giving your old car a look!