Features: 1Dual USB Fast ChargeCharge multiple mobile phones simultaneously. 2High-quality music playbackBluetooth 5.3 wireless transmission ensures stable and clear audio. Advanced noise reduction technology delivers crisp, high-fidelity sound. Play music through the car stereo via USB flash drive 32GB or TF card 32GB. Note: U disk or TF card supports WMA, MP3, WAV, APE, FLAC music formats. 3Hands-free callBuilt-in microphone with CVC noise suppression technology for clear hands-free calling. Automatically switches from music playback to hands-free mode when answering a call. One-touch answer/end call function. Convenient for driving. 4Wide CompatibilityBluetooth FM transmitter compatible with all devices supporting Bluetooth connectivity. Works with iPhone, iPad, Android phones, tablets, and other Bluetooth-enabled devices. Easy setup and operation. 57 Colors RGB LED BacklightFeatures 7-color RGB LED lighting for a stylish visual effect. Specification: Name: Car Bluetooth Transmitter Bluetooth Version: V5.3 Charging Interface: USB dual port with 3.1A and 1A output PD Interface: Supports PD 30W fast charging Power Control: One-key soft power on/off Lighting: RGB backlight Hands-free Function: Bluetooth hands-free calling Audio Technology: Supports Bluetooth stereo music with DSP enhancement Frequency Range: 87.5108.5 MHz Voltage: 12V Special Features: MP3 playback, Hands-free calling, FM transmitter Package Includes: 1 x Bluetooth FM Transmitter 1 x User Manual Notice: Manual measurement may result in a 12 cm size variation. Actual product color may vary due to lighting conditions and screen display differences.