About: USB cable or 3 x 1.5 v batteries(not included) add 50ml water or ice water to the box, then you will feel cool flavouring agent will make the air fresher. Material: The ABS + electronic component can be used for notebook and pc cooling. Mini Air Cooler & Humidifier: Add water or ice in the box to feel cooler and keep the air humid great for refreshment add some essential oil or scents to make the air more refresh. Upgraded version: Adjustable dual bladeless fan.portable and lightweight, perfect for an office, home and outdoor camping, picnic and so on. Powered By: USB cable(included) or 3 * 1.5 v aa batteries(battery not included) Size: 116mm x 109mm x 136mm/4.56'' x 4.29'' x 5.35''(approx). The rate for 1 unit only and we will dispatch best-assorted colour Required Battery: 3 * 1.5V AA batteries Dimension: 116mm x 109mm x 136mm/4.56'' x 4.29'' x 5.35''(approx) Works With USB Power: Only charging cable will be delivered ( no charger included )