[Cool 7 LED backlight and portable size]: Our FM transmitter adopts 7 color LED backlight design, which can change from red / green / blue / yellow green / purple / cyan / silver to a comfortable car environment for you to you can drive. safely operated at the same time. The FM transmitter car kit is small, which fits your cigarette lighter perfectly and gives you a comfortable experience.[Excellent Crystal Clear Stereo]: Bluetooth V5.0 chip makes connection faster and data transfer more stable. Built-in advanced cancellation technology can reduce external ambient noise and provide lossless sound quality for music.[Quick Charge QC3.0 & Dual USB] The charging speed of QC3.0 is 4 times faster than standard chargers and it only takes 35 minutes to charge 80% of compatible devices. You can use the 2 USB ports of the Bluetooth FM transmitter to charge two devices at the same time.[Siri / Google Assistant and hands-free calling]: This Bluetooth FM transmitter supports Siri / Google Assistant for voice guidance such as sending texts, incoming phone numbers or directions. Noise canceling technology can suppress road noise and give you a clear and clear hands-free voice.[Wide Compatibility]: This car bluetooth adapter can be used with any bluetooth device such as iPhone, iPod, HTC, Galaxy, Sony, Android tablet and smartphone. It is suitable for 12V-24V cars and trucks. In addition, you can also enjoy music via Bluetooth / USB stick (32 GB) / MicroSD card (32 GB). (Only support WMA MP3 WAV APE FLAC music format on U disk or MicroSD card)