USB Mini Desktop Power PC Laptop Fan Desk Table MAC White Ultra-quite design. Pitch angle can be adjusted upwards or downwards. With key switch. USB Powered, no external power required. Plug and play, easy install. Durable soft fan blades make you free of injury. Super mute. USB transformer can be purchased on its own power supply, the proposed purchase of 5V, 1000MA transformer above. Personalized multi-color options. Air volume comfort ,close to use ,all seasons. Notebook and PC cooling fan may be taking.Body size: 149.73 x 96.3 x 146.5 mm.Fan diameter: 96mm. Body size: 149.73 x 96.3 x 146.5 mm. Fan diameter: 96mm. Power supply: DC5V. Power consumption: 2.5 ? 0.25W. Wire length: 1.2m.