... convenience, connecting to your MP3,MP4, CD, DVD, iPod, iPhone, GPS, PSP, mobile phone, notebook computer, Hi-fi speaker, U-disk ... and noble metallic shell designed.l Several colors and power supply manners including battery, computer USB, adaptor DC-5V allow ... 1.77 inches (external diameter 45mm) Magnetic resistant 4Ohmsl Power supply: 5V/1000Ma AC power adapter, computer USB power rotate connect ...