Using this humidifier is easy. First, fill the water tank with clean water, but make sure not to exceed its 1 - liter capacity. Then, choose your power source, whether it's USB, car power supply, or AC. Once it's powered on, use the mechanical controls to set your desired settings, like the timing function for over 8 hours. When using, place it in an area of 21 - 30 square meters. As for safety, thanks to the water shortage and power failure protection, you don't have to worry about it running dry or causing any issues. For maintenance, regularly clean the water tank to prevent the growth of bacteria. Wipe the exterior with a soft, dry cloth. Keep it away from direct sunlight and heat sources. That's all you need to know to enjoy the benefits of this humidifier.