... Perfect combination of function and shape.New mini aluminum vibration film loud speaker, which has clear alt and pure ... mini speaker with your computer, laptop, iPhone, iPod, DVD, CD, MP3, MP4, mobile phone, GPS, PSPSupport TF Card. (memory cards NOT included)Portable ... : 150-1800Hz (±3dB)Signal and noise ratio of power amplifier: ≥80dBLoudspeaker: 1.77" (external diameter 45mm)Inpedance: 4ohmsPower ...