Miro humidifiers feature a revolutionary floating design, and the NR07G model has many features that allow users to customize their experience. The primary design principle is that all parts of the main body (including the ultrasonic mist-maker and fan) are waterproof and washable. It comes apart easily for simple washing in hot soapy water, and easy maintenance. The mist-maker floats inside a bowl and is connected to an external control knob to adjust the intensity of the humidifier. Each Miro humidifier comes with several accessories to meet the needs of various users. We recommend using purified water with your humidifier. Each machine comes with different easily swappable Vapor Caps to direct the vapor out of the top of the machine in different ways. The Tea-Kettle cap points to the side and can be positioned in any direction in 360 degrees, which makes it ideal for installation on a bed-side table, or on a shelf. The Volcano cap points straight up. Miro has a top-opening water tank so can be easily filled without stopping operation. The simple and elegant design blends in with any decors.