Mini Amplifier, ELEGIANT HiFi Digital Super Bass Stereo Audio Amplifier Support USB / SD / MMC Card Built-in FM Function, DC 12V Input Blue With FM radio function, digital display. Imported high-quality power amplifier IC, HIFI sound quality. 12 V power supply for car and motorcycle, colorful dynamic LED level display. Treble bass volume independent regulator with remote control , more convenient. With USB / SD interface, can play MP3 audio files directly , external high quality RCA inputs for connecting CD / DVD or computer and other sources.