You can try a variable ac-dc power adapter then set it to the rating. This is the information I could find in a manual on google. I’m not sure if the dc connector from this one will fit, you will need to find out the size of the end connector. https://www.amazon.com/OMNIHIL-Adapter-Compatible-Ultrasonic-Humidifier/dp/B079P9HRJX/ref=sr_1_9?keyw...-9 “ To avoid fire or shock hazard, plug the AC Adapter into the humidifier then plug the humidifier direct to a 120 VAC or 240 VAC electrical outlet. “ Please reference the manual before executing anything. Remember V=IR, P=IV, https://www.sharperimage.com/si/pdf/manu...