Using this hand dryer is super easy. Just place your hands under the dryer, and it will automatically start drying. The dryer is designed to be touch - free, so you don't have to worry about getting it dirty. When it comes to power, you can choose between 110 - 120V or 220 - 240V depending on your needs. You can also adjust the air speed and heat to your liking with the on - off switch. As for maintenance, make sure to clean the outside of the dryer regularly with a soft cloth. The HEPA filter is removable and should be replaced periodically for the best performance. To replace it, just access the separate chamber where the filter is housed without having to disconnect the whole dryer. Also, keep in mind that this dryer is approved by Underwriters Laboratories, Inc, so use it according to the standard to ensure safety. And enjoy the 5 - year warranty that gives you peace of mind.