... For playing music/pause. VOL- for turn down the volume, VOL+for turn up the volume. For previous item For next item Mini audio box ... with concept integral stereo portable mobile music, connecting your MP3,MP4,CD,DVD,iPod,iPhone,iPad,GPS,PSP,mobile phone, ... 3dB)Signal and noise ratio of power amplifier: ≥80dBLoud speaker 1.77 inches (external diameter 45mm)Magnetic resistant 4OhmsPower supply ...