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About this item Ultrasonic humidifier can cover the water surface well, absorbent sponge or towel for better effect with finer particles and higher spray level. Working time can be 2 to 8 hours, the spray volume of this atomization module can achieve 30 to 40ml per hour. With a low noise of less than 36DB. Simple and easy-to-use atomizer drive, only need to sweep the frequency drive board to charge, then press the button to start. Ultrasonic mist maker is a humidifier DIY kit, which is widely used in atomization equipment such as USB humidifier, perfume atomizer, aromatherapy atomizer, etc. DC 4.5V~5.0V, Work Temperature:0℃~85℃, Work Humidity:10%~90%RH Note: that the welding surface of the atomizer plate faces upwards. 3. Press the key to start it. Then Enjoy Your Soft Moist Air. › See more product details