... button * Powered by USB, with USB line * Unit size: 11*11CM one speaker size * Material: ABS Packing: Each in white boxMeas ... CD, DVD, iPod, iPhone, GPS, PSP, mobile phone, notebook computer, Hi-fi speaker, U-disk and TF card.Perfect combination of NANO ... : ≥80DbLoud speaker 1.77 inches (external diameter 45mm) Magnetic resistant 4OhmsPower supply: 5V/1000Ma AC power adapter, computer USB power ...