1. Input: DC 12V-24V, Dual USB Output, charging port output DC5V 2.4A MAX. 2. Bluetooth V4.2, auto-connect, Bluetooth range up to 5 meters 3. Built-in Microphone, Answer/Reject/Hang up/Recall all in one button 4. Display car voltage while plugged in 5. Support Bluetooth Music, USB Disk or micro SD Card up to 32GB in MP3/WMA/FLAC/WAV format 6. Crystal sound quality, listen music, navigation, broadcast and phone calls clearly 7. FM Frequency: 87.5MHz - 108.0MHZ 8. Original design, design patent acquired