Low Noise:Humidifiers has less than 30 dB quiet operation and small and light, perfect for home bedroom, office in 20-30 square meters, or portable for car, travel. | Powered by USB:5V micro USB powered, convenient for carry around, compatible with any device with USB port such as laptop, desktop, power bank, socket, power socket. | Product Contents:- Humidifier*1
- USB Cable*1
- Manual*1
- Replace Cotton Core*2
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