... .ISO,CE,FCC Features:New mini aluminum vibration film loud speaker, which has clear alt and pure woof. The unique ... for playing music. (memory cards NOT included)Compatible with: Mp3, Mp4, CD, DVD, iPod, iPhone, GPS, PSP, Mobile phone, Notebook computer ... -1800Hz (±3dB)Signal and noise ratio of power amplifier: =80dBLoud speaker: 1.77" (external diameter 45mm). Magnetic resistant 4OhmsPower supply: 5V ...