... . And it can be used as a normal speaker also. With this mini music loudspeaker, you can also enjoy the best home ... . Mini audio box with new concept integral stereo portable mobile music, connecting your MP3, MP4, CD, DVD, iPod, iPhone, GPS, PSP ... -18000HZ (+-3DB) Signal and noise ratio of power amplifier :>=80Db Loud Speaker: 1.77 inch (external diameter 45mm), Magnetic resistant 4 Ohms ...