Features 1、Mini size for convenient portability. 2、Evaporate the water and humidify the air, creating a comfortable and fresh environment 3、Charge via USB for convenient use anywhere! 4、Applications: Car, Travel, Home, Offices, Outdoor, Bedroom, Living room, Dormitory, College, etc. 5、Easy to use: just access to power supply and then put it into water. Specification This mini humidifier can increase the humidity and clean the air to prevent dry skin and dry mouth, bringing you a comfortable,healthy 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. Features: Mini size for convenient portability. Evaporate the water and humidify the air, creating a comfortable and fresh environment Charge via USB for convenient use anywhere! Applications: Car, Travel, Home, Offices, Outdoor, Bedroom, Living room, Dormitory, College, etc. Easy to use: just access to power supply and then put it into water. 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 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