1. Charge your USB device through the USB port
2. Volume rotating button and power switch in one button.
3. 7 built-in EQ: Normal, ROCK, POP,CLASSIC, Country, JAZZ, DBB.
4. 3.5mm jacket audio input, support line-in.
5. Voltage: DC12V-24V.
6. Files supported: MP3/WMA.
7. Working currency: 60-70mA.
8. FM frequency range: 87.5-108.0MHz.
9. SNR: 85dB (FM: 65dB).