Features: Humidifier uses various methods to atomize water to maintain high humidity levels in a room and generate natural negative oxygen ions. Supports cardiovascular health and metabolism. Produces a large mist output with high-performance water atomization and operates silently, so it does not disrupt daily activities or work. Compact and portable design makes it ideal for home use. Suitable as a gift for family or friends. Product Name: Donut Humidifier Material: ABS Shape: Round Color: White Size: 50x50x20mm Power Supply: USB Function: Negative Ions Tank Capacity: Less than 1 liter Number of Mist Outlet: 1 Operation Mode: Mechanical Timer Function: Not available Low Water Power Protection: Supported Cable Length: 1 meter Suitable For: Household Use Note: It is recommended to use a larger cup. A small cup may cause surface tension that prevents water from entering the humidifier’s inlet, which can affect mist performance. Package Contents: 2 x Humidifier Please note: Only the items listed above are included. Other accessories shown are not included. Lighting and monitor differences may cause slight variations in color between the product image and actual item. Measurement error allowed is +/- 1-3 cm.