Using this hand dryer is simple. Just place your hands under the dryer, and it will start automatically. The air speed and heat can be adjusted according to your needs using the on - off switch. When it comes to maintenance, you can easily remove the HEPA filter for cleaning or replacement as it's housed in a separate chamber. There's no need to disconnect the dryer. Remember to use the dryer within the specified voltage range (either 110 - 120V or 220 - 240V). Keep the dryer clean and dry to ensure its long - term performance. If you have any problems, refer to the 5 - year warranty for support.