... 3, Less noise, more cooling New design Portable usb fan1,Power supply: USB Port 2,Less noise, more cooling, Safe and ... Plug-and-play: no external power supply needed10,Power supply: 5V DC directly from the USB port11,Compatible with PCs, notebook, ... Media Players, Memory Card and other USB products.Being a Hong Kong based electronic components company incorporated in 2005, CHAOQIANG INTERNATIONAL ...