... flexible neck 3, Less noise, more cooling New design Portable usb fan1,Power supply: USB Port 2,Less noise, more cooling, Safe and ... power supply needed10,Power supply: 5V DC directly from the USB port11,Compatible with PCs, notebook, netbook, and PDAs12,Logo printing ... .With the excellent R&D team, we also have some new models every year; Backed up by our strong research ability ...