This fan is specifically designed this lightweight air conditioner fan for individual use. It is easy to carry and not taking up space space. Great for bedroom, office, dorm, trip, etc. Enjoy the coolness and no longer have to worry about the electricity bills. You can add small ice cubes in the water tank if you want more cooler. It is not need to add water normally. Features - Color: Blue. - Material: ABS and PP. - Size: 13.50 x 11.50 x 10.50 cm/ 5.31 x 4.52 x 4.13 inch. - Rated voltage: 2.5 W. - Power Supply: USB/ 3 AA Battery (Not Include). - Just open and use the USB to plug in you computer, you can enjoy the cool air. Portable and lightweight design, very easy and convenient to carry. - Air conditioners produce anion air at the same time they produce cold air. They can purify the air and improve the living environment. - It can also help regulate the body's metabolism and delay cell aging. It is a good product for improving the quality of life. - Portable design, small size, you can easily carry it out, very suitable for homes, offices, outdoor picnics, etc. - Two power supply methods, you can use the USB port of mobile devices such as laptops for power supply. Use the 3 AA battery to supply power. (Only included USB cord, no included the battery.) Package list: 1 x Air Cooler Fan 1 x USB Cable