3 Playing Modes & Colorful LightsFM Bluetooth transmitter has 3 playing modes. A. Bluetooth connection B. U disk (up to 32GB) C. TF card (up to 32GB), to provide you with different options. Support MP3/WMA/WAV/FLAC and other music file types to play. Colorful breathing atmosphere lights provide you with a romantic atmosphere at night and light up your eyes.Hands Free Call & Driving SafetyThe Bluetooth transmitter has a built-in microphone and noise cancellation (CVC) circuit to provide hands-free calls and clear call sound. To answer/hang up/reject/redial calls and volume control (rotation) by controlling the multi-function buttons, you can focus more on driving and improve driving safety.Bluetooth 5.0 and Wide CompatibilityThe FM transmitter adopts Bluetooth 5.0 technology to provide efficient and stable connection and lossless audio transmission. And compatible with iPhone, iPad, Tablet, Samsung, HTC, Sony and other Bluetooth devices.EASY TO SETInsert the bluetooth transmitter into the car cigarette lighter, adjust the car radio to a blank FM frequency (87.5-108.0 MHz), then adjust the FM transmitter to the same frequency, and then connect your phone to the transmitter via Bluetooth to enjoy lossless music. The FM bluetooth transmitter will automatically connect to your phone when it is turned on for the second time.