Product Attention please 1. Please always remember to add pure water to avoid impurities affecting the cooling function. 2. Clean the water tank with a cup brush or once a week Toothbrush. 3. If you want to enjoy cool wind, you can put ice cubes in the water tank. 4. If there is water in the tank, please keep it straight. Remember to move in parallel. Dont lean on it. 1. Multifunction Personal USB fan, humidifier, air purifier 3 in one multifunction design. Cools, humidifies and purifies for better air, keeping you away from dry air and enjoying your cooling summer. 2. Energy SavingUse the latest H2O Cool Fusion technology and evaporation technology, draw in and release hot air them through a wet filter. Cool wind then escapes on the other side. The built-in water tank can blow cool wind for 5-7 hours. Free, energy-efficient and environmentally friendly. 3. Portable and easy to usePowered by a USB cable, portable and compact, perfect for using in the kitchen, office, dormitory, on your desktop and next to your pets, ideal for travel and camping. 4. Personal Air CoolerMini evaporative personal space cooler designed for individual use and does not use refrigeration or chemicals to cool the air. So you should not expect the same results as with an air conditioner. So you can create your own personal comfort zone. 5.Use TipsWhen the water tank is full of water, please move it in parallel, dont lean it in case of water leakage. Three wind speeds (high, medium, low) can be set. You can choose the most suitable one for your free time, sleep or work time. Package Included 1 * Portable Air Cooler 1 * USB Cable (adapter not included) 1 * Use Manual