Easily add ventilation with this USB mini fan with USB port. Plug in to any USB port available on solar controller， phone charger with USB 5V and etc.... Features: Ultra-quite design Strong blowing and low power consumption Material : Metal Free adjustable angle 360 up and down With on/off switch at the back Made by DC brushless technique USB Powered Suitable for Notebook， PC， and any appliance with USB port Light weight and fashion Plug and play， Easy install Power supply: DC5V Fan comes with USB Cable Approx size: 200 x 100 x 200mm Color available : Black Package Content: 1 X USB Fan (Note : Photo attached is for reference only， it may be slightly varied in items of colour， shape from the actual item delivered from time to time)