Feature: 1. With Bluetooth answering, hanging up, rejecting, redialing and other functions, support Bluetooth stereo music playback. 2. Support MP3/WMAWAV/FLAC/APE format music; support FM full frequency point transmission function 87.5‑108.0MHZ, support U disk memory card playback (Max 64G). 3. U disk port supports 5V/1A mobile phone charging, 5V/3.1A mobile phone charging, and mobile phone charging recognition. 4. Adopt digital tube display, support colorful atmosphere light display, changing the car's internal environment, change your mood. 5. Support automatic power‑off memory function, support car battery voltage detection and navigation voice prompt. Specification: Item Type: FM Transmitter Material: ABSWorking Voltage: 12V-24V USB1 Output: 5V/1A USB2 Output: 5V/3.1A Support Music Format: MP3/WMA/WAV/FLAC/APE Support U Disk Capacity: Max 64G Support Memory Card Capacity: Max 64G(Not Include) Battery Voltage Accuracy: Error ±1V Signal to Noise Ratio: >60dB Distortion: <0.1% Frequency Response: 20Hz-20Khz Left and Right Channel Separation: ＞60dB Bluetooth Version: Version 5.0 Bluetooth Sound Processing: With A2DP (Advance Audio Distribution Profile) Function Bluetooth Transmission Distance: Less Than 10m/11yd Bluetooth Microphone Effective Distance: Approx.0.5-2m/0.5-2.2yd How to Use: Plug and Play. Package List: 1 x FM Transmitter1 x Manual