SIMPLE OPERATION - The multi-functional rotary knob on the right side of the toilet seat is used to change the rinsing modes, start the warm air dryer, and control the lights; When rinsing, you can press the button to switch the mode from regular, powerful, or massage cleaning; After rinsing, you can press the button to start the warm air function ADJUSTABLE TEMPERATURE - The 2 buttons on the left side of the toilet seat allow you to set the temperature; The right one controls the seat temperature among 3 levels; Press the left one to adjust the water temperature when rinsing, and to set the air temperature when the water spray is off; The lights between the buttons show the different levels of temperature CONSIDERATE DESIGN - Equipped with double nozzles, the device allows for posterior rinsing and feminine rinsing, which protects the health of families (available even during a power failure); The ABS nozzle has a self-cleaning function; The spraying angles and positions are designed for good ergonomics PREMIUM MATERIAL - Made of high-quality flame-retardant PP, the toilet seat prevents breakage and is resistant to corrosion; Its surface is smooth without sharp points, edges, or corners, which is safe and easy to clean; Upgraded copper fitting not only perfectly fits the metal pipe to prevent leakage, but is also more durable and has a longer lifespan EASY TO INSTALL - Measuring 20" x 14.7" x 3.3", the installation of the toilet seat can be accomplished without professional assistance in the simple steps indicated in the instruction manual; The bidet works by turning a knob, which first goes through self-cleaning and then operates normally, which is simple to operate even by children and elders