Wireless in-Auto Bluetooth Adapter :This fm Bluetooth transmitter car is a great vehicle gadget, easy to use, set-up & control. It can serve different functions, like QC3.0 fast charging, music player & hands free calling. The good thing about this transmitter is that it comes with a memory card slot and 7 Lighting Effects, you can opt to save your favorite songs there, it is played in your car, just like the old school. 7 Lighting Effects:Our bluetooth FM transmitter has 7 lighting adjustment modes , which can be used to illuminate the car inside and match different music mood.Short press the "M" button to switch the light color, the LED light will change from the order of red/orange/yellow/green/cyan/blue/purple2 Charging Ports & Bluetooth hands- free : The car bluetooth adapter supports charging 2 devices simultaneously, one QC 3.0 charging port (5V/3A), another USB charging port (5V/2.4A). the USB radio bluetooth adapter supports hands-free calling , you can answer/ reject/ redial calls with one click ,make driving safer.Easy to use: The package comes with an air vent clip and a sticky seat. You can mount it on the car air vent or stick it on the dashboard. The 1.1-meter cable provided means this device can be used anywhere in the car.In addition, when a call comes in, the bluetooth car adapter will automatically switch from music playback mode to bluetooth hands-free mode.Wide compatibility: It supports Android and IOS systems, like iPhone, iPad, iPod, tablet, smartphones etc, built-in Bluetooth 5.0 chip and noise cancellation technology (CVC) that makes hand-free calls sound stable and clear . TheBluetooth car transmitter has three modes of music playing, via Bluetooth connection.