How to add water steps: Open the silicone cover on the right side of the handheld fan, our mini fan comes with a 15ml water bottle, you can use to add water to the built-in water tank. After adding water, it can be used for 1-1.5 hours.Tips: 1. The capacity of the built-in water tank is 15ml.Do not add too much to prevent overflow.2. Liquids such as perfumes and aromatherapy are not allowed into the tank as they may clog the outlet.3.If the water is insufficient, spraying will stop.Please add water time scenes: portable fan scanning on indoor beach outdoors, such as beach vacation, tourism, camping, show competitions, yoga, etc. Mini size: fits in your pocket however you want. Length: 4.8" Height: 2.2" Width: 1.7" Weight: 0.44 lbs