The filter can effectively filter the impurities in the water and prolong the service life. More convenient to use you can wash anywhere, whether inside or outside. When the battery operated pressure washer is working, press the red button, so you don't have to keep pressing the switch, and it will continue to work. This makes your work easier, and mini pressure washer with a 180° adjustable nozzle. Cleaning power improves as the angle grows smaller, and cleaning range increases as the angle gets larger.