Specification: Rated voltage: DC 5V. Input power: MAX 7W. Maximum wind speed: 2.8 m/s. Rated evaporation capacity: 100ml/h. Rated output air volume: about 108m3/h (Q=3600VA). Noise: 55dB Standard value: 55dB. Maximum air supply distance: about 2.5m (subject to the ability to blow A4 paper, for reference only). Total length of power cord: 12cm. Package list: Air cooler*1. USB Cable*1. User Manual *1. Note: 1.Long press the "wind speed" key for 3 seconds to turn on and off the device. Personal air cooler only works normally with 5V 1.5 above adapter(kit not include adapter). 2.Please use 5V 1.5A adapter(kit not include adapter). 3.Do not add oily essential oils in the water tank to avoid corrosion of the product. 4.The water level in the water tank shall not exceed the highest water level line.