Features: The fan runs when it is connected to the solar panel. It can be used individually by connecting the USB port of the computer. Energy saving and environmental protection: ultra low power, electricity saving, low carbon environmental protection,energy saving and health. Quiet bottom noise, assembly noise reduction motor,fan running smoothly and quiet. Made of durable material,sturdy and wear resistance. With Anti-slip base,stable and suitable for office,travel or camping. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Material:Metal Size: 4/6/8 inch(Optional) Cable length: 120cm 4 inch: 3W 6V Current: 0-500mA. Size: 145 x 145mm, Output: USB 2.0 interface. 6 inch: 4.5W 6V Current: 0-750mA. Size: 165 x 165mm, Output: USB 2.0 interface. 8 inch: 5.2W 6V Current: 0-865mA. Size: 210 x 165mm, Output: USB 2.0 interface. includes: 1 x Solar Panel 1 x USB Fan