Chris-Wang Mini Desktop USB Tower Fan, Bladeless No Leaf Air Conditioner Cooling Cool Desk Fan, 2-Speed Avalable and Silence, White Power Source : 5V, 0.5A, Wattage : 2.5W, DimensionsDia. x H): 4.13 x 13.11 inch / 10.5 x 33.3 cm Good for any usb connector devices(computer, laptop, PC, Notebook, Netbook, Tablet etc.)and you. Power on/off, High/Low wind force adjustable. Small size and tower shape designed, save space, moreover, no plug and no bettery, lightweight is easy to carry and install. Compatible with USB devices such as: Computer, Laptop, Notebook, Tablet PC, USB 2.0. Bladeless design--Safe for children.