Product information Water tank capacity: 500ml Working voltage: DC 5V Rated power: 1 , 25 - 2W Spraying speed: 30 - 50 ml / h Noise: less than 28 dB Size: 95 * 95 * 129 mm Weight: 236 g Packing list< br />USB power supply (cable included) 500ml large capacity Healthy humidification Automatic shutdown (12/18 hours) Night light function Quiet operation How to use the humidifier? Enjoy hydration in four easy steps Step 1: Rotate counterclockwise to unscrew the top cover Step 2: Unscrew the top cover and add water to the pan server water tap 3: Rotate turn the top cover clockwise to connect it to the power supply. Step 4: Click the button to work on the product Night light function Hold down; the spray button for the first time to turn on the LED night light. (Warm light) Press and hold the spray button a second time and the LED night light will turn off. the respiratory lumen. (warm light)