Features: Humidifier use a of ways to atomize the water; to maintain high humidity room; and produce a certain number of natural negative oxygen ions; cardiovascular System and the human body's metabolism plays a protective role; This paragraph humidifier fog ; High-performance water atomization; And the working state of silence; Do not affect your life while you use work; Beautiful portable is the leader in the humidifier; Can carry; send family; send friends the . Description: Product Name: Donut humidifier Material: ABS Shape: round color: White Size: 50x50x20mm Power supply: USB Function: negative ions Tank capacity: 1 liter or less The number of fog mouth: 1 Mode of operation: mechanical Timing function: No timing Water shortage power protection: support Line length: 1 meters Suitable for: household Note: It is recommended to use a cup with a cup. Because the cup is small, the tension of the water will difficult for the water to enter the water inlet the humidifier. This will affect the fogging effect. Package Contents: 1x humidifier Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.