... , usb drink cooler, usb fan, usb gadgets, notebook cooler, usb warmer, usb ac, usb cooled, usb, cooler cup, usb card reader, usb bottle opener, notebook usb cooler, usb laptop cooler, usb cup ... ) Ion polishing technology is introduced to metal plate, fully improve interface, add well isolating material, enhance cool and warm effct. 6 ...