... , iPhone, GPS, PSP, mobile phone, notebook computer, etc.2) This speaker can be deemed as perfect combination of classic and modem ... ) New mini aluminum vibration film loud speaker, which has clear alt and pure woof. The unique design makes tone performance perfect.4 ... ) Signal and noise ratio of power amplifier:>=80db 4) Loud Speaker: 1.77 inch (external diameter 45mm), Magnetic resistant 4 Ohms ...