Clear Sound and Lossless MusicBuilt-in dual microphone design collects sound better than a single one; CVC noise reduction technology effectively reduces noise and echo; Advanced Bluetooth 5.0 chip ensures stable connection and fast transmission speed.So this car bluetooth adapter will bring you crystal clear calls and extraordinary high-fidelity music streaming while driving. USB-C PD Fast Charging & 3 USB PortsCar Bluetooth Transmitter has 3 charging ports: One 18W USB-C (Type-C) PD charging port output 5V/3A, 9V/2A, 12V/1.5A max And it only takes 30 minutes to charge compatible devices to 50%; a 5V/2.4A USB port compatible withnormal charging; the USB drive port on the top can also be used as a charging port. Share the charging port with friends while listening to music. 2.0 Inch LCD Screen and Power On/Off ButtonThe transmitter has a large LCD screen, which not only displays the FM frequency, but also the car battery voltage, so you can keep abreast of the battery usage. One-key shutdown, saving the trouble of pluggingand unplugging the power every time you start and get off the car. Just long press the "CH" button compatible with 3S to turn off the FM transmitter (Note: the charging port can still be used even if the power is turned off). Hands-free calling and voice assistantJust tap the call button to answer/redial/hang up/reject incoming calls, switch between incoming calls and music seamlessly. By using Siri or the Google Assistant to make calls, send texts, or get driving directions,you can focus on the road. Additionally, this car Bluetooth kit supports broadcasting voice announcements from existing navigation apps. You don't have to look at your phone as often anymore. 9 Colors LED BacklightDo you want to make your car interior look cooler and more stunning? The backlit circular design will meet your expectations with its 9 lighting color options including red/blue/green/yellow/cyan/purple/white/rainbow/breathingrainbow. With lights, you can find buttons more accurately and quickly in the dark compatible with safe driving (note: lights can be turned off). Humanized button design All buttons are tactile and easy to press. Of these, the volume control is worth mentioning because it responds to every turn to adjust the volume. Instead of staring at it, you can keep your eyes on the road One-click close You don't have to worry about a dead car battery. Just press and hold the "CH" button compatible with 3 seconds to turn off the transmitter. (Note: The charging port can also be used when the power is off) Clear and concise LCD display The LCD screen displays the most important incompatible withmation you are interested in - FM frequency and car battery voltage. At the same time, we set the brightness of the display to the most comcompatible withtable average brightness compatible with the human eye, which is bright enoughbut not harsh.