Alytimes Desktop Dual Bladeless Portable Adjustable Angles Scented Air Conditioning Air Cooler USB Electric Mini Fan (Blue) Powered by USB cable or 3X 1.5V batteries(not included) Add 50ml water or ice water to the box,then you will feel cool Flavouring agent will make air more fresh Material:ABS+electronic component Can be used for Notebook and PC cooling Mini Air Cooler &amp; Humidifier - Add water or ice in the box to feel more cool 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 office, home and outdoor camping, picnic etc. Size: 116mm x 109mm x 136mm/4.56&#039;&#039; x 4.29&#039;&#039; x 5.35&#039;&#039;(approx) Powered by USB cable(included) or 3 * 1.5V AA Batteries(battery not included) Standard Density Grid: Each gap is not more than 0.8cm. kids are also safe to use it. Full ABS Resin Shell: Impact resistance, heat resistance andcorrosionresistant  characteristics. Toggle Switch: Efficient heat radiation protection, built in rotating shaft,two outlet up  and down support adjust angles. Right Inlet: The wind blows smoothly and stably. Into the wind double, the wind out is also double. Host 11.5CM, the host is wider, the air volume is greater. It can adjust the angle of the left and right air outlet. Two up, two down, left up and right down, left down and right up. Air blowing up and down, a greater angle, the cold area can up to 80 degrees. After switching off the electric power, the battery power is cut off, and the electric power is avoided so as to avoid the explosion accident. It basically belongs to the mute state.