The USB Donut Humidifier is powered by USB, making it convenient and easy to use. Simply connect it to a USB port, such as a computer, power bank, or car charger, and it will start working. It has a cute and unique donut shape. Features -Color:White -Material:Plastic -Size:5.00X5.00X2.00cm/1.97X1.97X0.79in -Power Supply: USB -Rated Voltage: <=36V -Noise: Less than 36dB - Conveniently compact and lightweight, this mini USB humidifier is easy to carry with you wherever you go. - With a USB power supply mode, this humidifier offers flexible usage options for your convenience, can widely use. - Safe and convenient to use, not easy to break or deform, this humidifier is reusable, can be applied for a longtime. - Portable design, easy to take with you anywhere, effectively moisturize dry skin, help you reduce skin peeling. - This mini humidifier for bedroom or car works silently so it won’t bother you while working and sleeping, useful. Package list: 2 x humidifier