... 3, fm, radio, mp3 4, support USB drive and TF card fm radio usb sd card reader mp3 mp4 speaker Description:100% Brand ... New!Mini Aluminium Vibration Music Player Speaker FM Radio TF ... (+-3dB)Signal and noise ratio of power amplifier:?80DbMagnetic resistant: 4 OhmsPower supply: USB power supply availableColor: Silver, Pink, Blue, ...