Description: This mini humidifier can increase the humidity and clean the air to prevent dry skin and dry mouth, bringing you a comfortable, and fresh living environment. Besides, its mini size is very convenient to carry. it can be used widely in many places, such as car, home, office, dormitory, etc. Specifications: Product Name: Doughnut-shaped atomization humidifier Product Size: 51 x 51 x 20mm / 2.01 x 2.01 x 0.79inch Material: ABS Shape: Ring-shaped Power Input: DC5V 500mA Power Supply: USB Package Weight: 40 g Color: White, Blue, (Optional) Note: It is recommended to use a larger cup. Because if the cup is small, water tension leads it difficult for water to enter humidifier inlets. which will affect the fog effect. Package List: 1 x Doughnut-shaped atomization humidifier 1 x User Manual