General description Multifunctional portable fan designed for outdoor use, this small USB fan is perfect for the office as well. It features a built-in 2200mAh rechargeable battery and a lightweight, handle design, making it convenient to carry while hiking or traveling. Technical specifications Battery: 2200mAh rechargeable battery (included) Size: 10.2 cm Noise level: 40 dB Operating time: 2-7 hours depending on the mode used Usage Functions as a USB cooling fan and beauty humidifier, allowing you to refresh yourself after exercise or maintain your makeup. Offers 3 speed modes: low and high. Humidifier can operate continuously or intermittently, either independently or alongside the fan.